diff --git a/common/version/version.go b/common/version/version.go
index e9a68d128..ade0a26bc 100644
--- a/common/version/version.go
+++ b/common/version/version.go
@@ -5,7 +5,7 @@ import (
 	"runtime/debug"
 )
 
-var tag = "v4.4.0"
+var tag = "v4.4.1"
 
 var commit = func() string {
 	if info, ok := debug.ReadBuildInfo(); ok {
diff --git a/database/migrate/migrate_test.go b/database/migrate/migrate_test.go
index dee4a9ecf..5022e5600 100644
--- a/database/migrate/migrate_test.go
+++ b/database/migrate/migrate_test.go
@@ -59,20 +59,20 @@ func testResetDB(t *testing.T) {
 	cur, err := Current(pgDB)
 	assert.NoError(t, err)
 	// total number of tables.
-	assert.Equal(t, int64(19), cur)
+	assert.Equal(t, int64(20), cur)
 }
 
 func testMigrate(t *testing.T) {
 	assert.NoError(t, Migrate(pgDB))
 	cur, err := Current(pgDB)
 	assert.NoError(t, err)
-	assert.Equal(t, int64(19), cur)
+	assert.Equal(t, int64(20), cur)
 }
 
 func testRollback(t *testing.T) {
 	version, err := Current(pgDB)
 	assert.NoError(t, err)
-	assert.Equal(t, int64(19), version)
+	assert.Equal(t, int64(20), version)
 
 	assert.NoError(t, Rollback(pgDB, nil))
 
diff --git a/database/migrate/migrations/00020_alter_publickey_unique_prover_block.sql b/database/migrate/migrations/00020_alter_publickey_unique_prover_block.sql
new file mode 100644
index 000000000..5e08ca199
--- /dev/null
+++ b/database/migrate/migrations/00020_alter_publickey_unique_prover_block.sql
@@ -0,0 +1,17 @@
+-- +goose Up
+-- +goose StatementBegin
+
+DROP INDEX if exists idx_prover_block_list_on_public_key;
+
+CREATE UNIQUE INDEX if not exists uniq_prover_block_list_on_public_key ON prover_block_list(public_key) where deleted_at IS NULL;
+
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+
+CREATE INDEX if not exists idx_prover_block_list_on_public_key ON prover_block_list(public_key);
+
+DROP INDEX if exists uniq_prover_block_list_on_public_key;
+
+-- +goose StatementEnd