diff --git a/src/box/bootstrap.snap b/src/box/bootstrap.snap
index 4877919ffcfb8e5e08fd9d6bd22b12a63b9dd4a9..ecb047196e3383961b6837f8e7e764fdea45b617 100644
Binary files a/src/box/bootstrap.snap and b/src/box/bootstrap.snap differ
diff --git a/src/box/lua/upgrade.lua b/src/box/lua/upgrade.lua
index ae382eda9c455a27a3021de1d023a75cbebe7a69..9a6eaf1c5ea3b5450670d138200b101306b6008d 100644
--- a/src/box/lua/upgrade.lua
+++ b/src/box/lua/upgrade.lua
@@ -89,6 +89,7 @@ local function erase()
     truncate(box.space._sequence_data)
     truncate(box.space._sequence)
     truncate(box.space._truncate)
+    truncate(box.space._collation)
     --truncate(box.space._schema)
     box.space._schema:delete('version')
     box.space._schema:delete('max_id')
@@ -896,8 +897,8 @@ local function create_collation_space()
     box.space._index:insert{_collation.id, 1, 'name', 'tree', {unique = true}, {{1, 'string'}}}
 
     log.info("create predefined collations")
-    box.space._collation:replace{0, "unicode", ADMIN, "ICU", "", setmap{}}
-    box.space._collation:replace{1, "unicode_s1", ADMIN, "ICU", "", {strength='primary'}}
+    box.space._collation:replace{1, "unicode", ADMIN, "ICU", "", setmap{}}
+    box.space._collation:replace{2, "unicode_ci", ADMIN, "ICU", "", {strength='primary'}}
 
     local _priv = box.space[box.schema.PRIV_ID]
     _priv:insert{ADMIN, PUBLIC, 'space', _collation.id, 2}
diff --git a/test/box/ddl.result b/test/box/ddl.result
index 20808c32c3e0951ac35c1d3aa1e17d7599564cc4..6f01d89a6216ae4cca19b06081e36e19290bfa39 100644
--- a/test/box/ddl.result
+++ b/test/box/ddl.result
@@ -337,7 +337,7 @@ box.space._collation:auto_increment{'test', 0, 'ICU', 42}
 ...
 box.space._collation:auto_increment{'test', 0, 'ICU', 'ru_RU', setmap{}} --ok
 ---
-- [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 box.space._collation:auto_increment{'test', 0, 'ICU', 'ru_RU', setmap{}}
 ---
@@ -345,7 +345,7 @@ box.space._collation:auto_increment{'test', 0, 'ICU', 'ru_RU', setmap{}}
 ...
 box.space._collation.index.name:delete{'test'} -- ok
 ---
-- [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 box.space._collation.index.name:delete{'nothing'} -- allowed
 ---
@@ -461,24 +461,24 @@ _ = box.space._collation.index.name:delete{'test'} -- ok
 ...
 box.space._collation:auto_increment{'test', 0, 'ICU', 'ru_RU', setmap{}}
 ---
-- [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 box.space._collation:select{}
 ---
-- - [0, 'unicode', 1, 'ICU', '', {}]
-  - [1, 'unicode_s1', 1, 'ICU', '', {'strength': 'primary'}]
-  - [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- - [1, 'unicode', 1, 'ICU', '', {}]
+  - [2, 'unicode_ci', 1, 'ICU', '', {'strength': 'primary'}]
+  - [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 test_run:cmd('restart server default')
 box.space._collation:select{}
 ---
-- - [0, 'unicode', 1, 'ICU', '', {}]
-  - [1, 'unicode_s1', 1, 'ICU', '', {'strength': 'primary'}]
-  - [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- - [1, 'unicode', 1, 'ICU', '', {}]
+  - [2, 'unicode_ci', 1, 'ICU', '', {'strength': 'primary'}]
+  - [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 box.space._collation.index.name:delete{'test'}
 ---
-- [2, 'test', 0, 'ICU', 'ru_RU', {}]
+- [3, 'test', 0, 'ICU', 'ru_RU', {}]
 ...
 --
 -- gh-2839: allow to store custom fields in field definition.
diff --git a/test/box/hash.result b/test/box/hash.result
index ccbeebe5d700a09ba167ea00eeec189ddedd69e3..6893a1be0fa20b7e997b7c33d0ee35fe6f395055 100644
--- a/test/box/hash.result
+++ b/test/box/hash.result
@@ -461,10 +461,10 @@ hash:truncate()
 hash.index['primary']:drop()
 ---
 ...
-tmp = hash:create_index('primary', { type = 'hash', parts = {{1, 'string', collation = 'unicode_s1'}}, unique = true})
+tmp = hash:create_index('primary', { type = 'hash', parts = {{1, 'string', collation = 'unicode_ci'}}, unique = true})
 ---
 ...
-tmp = hash:create_index('secondary', { type = 'hash', parts = {{2, 'scalar', collation = 'unicode_s1'}}, unique = true})
+tmp = hash:create_index('secondary', { type = 'hash', parts = {{2, 'scalar', collation = 'unicode_ci'}}, unique = true})
 ---
 ...
 hash:insert{'Ёж', 'Hedgehog'}
diff --git a/test/box/hash.test.lua b/test/box/hash.test.lua
index 2e9fe34bba4d8979030bf770596574714370dba7..51192851b434b2199e2201c5abd120dffb80bbf6 100644
--- a/test/box/hash.test.lua
+++ b/test/box/hash.test.lua
@@ -214,8 +214,8 @@ hash:truncate()
 -- Collation test
 -------------------------------------------------------------------------------
 hash.index['primary']:drop()
-tmp = hash:create_index('primary', { type = 'hash', parts = {{1, 'string', collation = 'unicode_s1'}}, unique = true})
-tmp = hash:create_index('secondary', { type = 'hash', parts = {{2, 'scalar', collation = 'unicode_s1'}}, unique = true})
+tmp = hash:create_index('primary', { type = 'hash', parts = {{1, 'string', collation = 'unicode_ci'}}, unique = true})
+tmp = hash:create_index('secondary', { type = 'hash', parts = {{2, 'scalar', collation = 'unicode_ci'}}, unique = true})
 
 hash:insert{'Ёж', 'Hedgehog'}
 hash:insert{'Ёлка', 'Spruce'}
diff --git a/test/box/misc.result b/test/box/misc.result
index 947aeff22067cba425af8adc68668e9e3757bb55..1472587de4e4a4e32c2505aeb272d7b5be5ad0b1 100644
--- a/test/box/misc.result
+++ b/test/box/misc.result
@@ -1037,7 +1037,7 @@ s:drop()
 s = box.schema.space.create('test')
 ---
 ...
-not not s:create_index('test1', {parts = {{1, 'scalar', collation = 'unicode_s1'}}})
+not not s:create_index('test1', {parts = {{1, 'scalar', collation = 'unicode_ci'}}})
 ---
 - true
 ...
@@ -1074,22 +1074,22 @@ s:drop()
 s = box.schema.space.create('test')
 ---
 ...
-not not s:create_index('test1', {parts = {{1, 'number', collation = 'unicode_s1'}}})
+not not s:create_index('test1', {parts = {{1, 'number', collation = 'unicode_ci'}}})
 ---
 - error: 'Wrong index options (field 1): collation is reasonable only for string and
     scalar parts'
 ...
-not not s:create_index('test2', {parts = {{2, 'unsigned', collation = 'unicode_s1'}}})
+not not s:create_index('test2', {parts = {{2, 'unsigned', collation = 'unicode_ci'}}})
 ---
 - error: 'Wrong index options (field 1): collation is reasonable only for string and
     scalar parts'
 ...
-not not s:create_index('test3', {parts = {{3, 'integer', collation = 'unicode_s1'}}})
+not not s:create_index('test3', {parts = {{3, 'integer', collation = 'unicode_ci'}}})
 ---
 - error: 'Wrong index options (field 1): collation is reasonable only for string and
     scalar parts'
 ...
-not not s:create_index('test4', {parts = {{4, 'boolean', collation = 'unicode_s1'}}})
+not not s:create_index('test4', {parts = {{4, 'boolean', collation = 'unicode_ci'}}})
 ---
 - error: 'Wrong index options (field 1): collation is reasonable only for string and
     scalar parts'
diff --git a/test/box/misc.test.lua b/test/box/misc.test.lua
index 1cfc48d39846237f2788e2f11c7467f92473619d..96bdafd71e8aaabb848936d0797976c88ef4e0da 100644
--- a/test/box/misc.test.lua
+++ b/test/box/misc.test.lua
@@ -283,7 +283,7 @@ s:create_index('test5', {parts = {{5, 'string', collation = 'Unicode'}}}).parts
 s:drop()
 
 s = box.schema.space.create('test')
-not not s:create_index('test1', {parts = {{1, 'scalar', collation = 'unicode_s1'}}})
+not not s:create_index('test1', {parts = {{1, 'scalar', collation = 'unicode_ci'}}})
 s:replace{1} s:replace{1.1} s:replace{false}
 s:replace{'Блин'} s:replace{'Ёж'} s:replace{'ешь'} s:replace{'Же'} s:replace{'Уже'}
 s:replace{'drop'} s:replace{'table'} s:replace{'users'}
@@ -292,8 +292,8 @@ s:select{'еж'}
 s:drop()
 
 s = box.schema.space.create('test')
-not not s:create_index('test1', {parts = {{1, 'number', collation = 'unicode_s1'}}})
-not not s:create_index('test2', {parts = {{2, 'unsigned', collation = 'unicode_s1'}}})
-not not s:create_index('test3', {parts = {{3, 'integer', collation = 'unicode_s1'}}})
-not not s:create_index('test4', {parts = {{4, 'boolean', collation = 'unicode_s1'}}})
+not not s:create_index('test1', {parts = {{1, 'number', collation = 'unicode_ci'}}})
+not not s:create_index('test2', {parts = {{2, 'unsigned', collation = 'unicode_ci'}}})
+not not s:create_index('test3', {parts = {{3, 'integer', collation = 'unicode_ci'}}})
+not not s:create_index('test4', {parts = {{4, 'boolean', collation = 'unicode_ci'}}})
 s:drop()
diff --git a/test/engine/replica_join.result b/test/engine/replica_join.result
index aab48022bcec40ec7ae2f2ada7c3132eccbc8b3f..a003c0d875827a3c04bc911f61d613eb05d407fe 100644
--- a/test/engine/replica_join.result
+++ b/test/engine/replica_join.result
@@ -34,7 +34,7 @@ _ = space2:create_index('primary', { parts = {1, 'unsigned', 2, 'string'}})
 space3 = box.schema.space.create('test3', { id = 99997, engine = engine})
 ---
 ...
-_ = space3:create_index('primary', { parts = {{1, 'string', collation = 'unicode_s1'}}})
+_ = space3:create_index('primary', { parts = {{1, 'string', collation = 'unicode_ci'}}})
 ---
 ...
 box.snapshot()
diff --git a/test/engine/replica_join.test.lua b/test/engine/replica_join.test.lua
index cf151cac1d653f043dd7c12970f9ee4ae6e491d0..5c6ed11a6e37a1a7f24e06aab10b1bbef19e95ee 100644
--- a/test/engine/replica_join.test.lua
+++ b/test/engine/replica_join.test.lua
@@ -10,7 +10,7 @@ _ = space:create_index('secondary', { type = index, unique = false, parts = {2,
 space2 = box.schema.space.create('test2', { id = 99998, engine = engine})
 _ = space2:create_index('primary', { parts = {1, 'unsigned', 2, 'string'}})
 space3 = box.schema.space.create('test3', { id = 99997, engine = engine})
-_ = space3:create_index('primary', { parts = {{1, 'string', collation = 'unicode_s1'}}})
+_ = space3:create_index('primary', { parts = {{1, 'string', collation = 'unicode_ci'}}})
 box.snapshot()
 
 -- replica join
diff --git a/test/vinyl/layout.result b/test/vinyl/layout.result
index 0f274796bbc7c23906ad564dea7f538d6dee2c1a..f1a33ee2b9ddc9993474e8ad052dc1ea3bf47124 100644
--- a/test/vinyl/layout.result
+++ b/test/vinyl/layout.result
@@ -124,7 +124,7 @@ result
     - - HEADER:
           type: INSERT
         BODY:
-          tuple: [0, {0: 3, 7: [{'field': 0, 'collation': 0, 'type': 'string'}], 6: 512}]
+          tuple: [0, {0: 3, 7: [{'field': 0, 'collation': 1, 'type': 'string'}], 6: 512}]
       - HEADER:
           type: INSERT
         BODY:
diff --git a/test/xlog/upgrade.result b/test/xlog/upgrade.result
index d1cc579111eb52475791be0d65571bd1ebb770f0..891126728b8771f4e221b9c0ecafb5e0e530be1c 100644
--- a/test/xlog/upgrade.result
+++ b/test/xlog/upgrade.result
@@ -160,8 +160,8 @@ box.space._func:select()
 ...
 box.space._collation:select()
 ---
-- - [0, 'unicode', 1, 'ICU', '', {}]
-  - [1, 'unicode_s1', 1, 'ICU', '', {'strength': 'primary'}]
+- - [1, 'unicode', 1, 'ICU', '', {}]
+  - [2, 'unicode_ci', 1, 'ICU', '', {'strength': 'primary'}]
 ...
 box.space._priv:select()
 ---