diff --git a/pkg/services/sqlstore/migrations/annotation_mig.go b/pkg/services/sqlstore/migrations/annotation_mig.go
index c11ab34dd13..3e2a18787c9 100644
--- a/pkg/services/sqlstore/migrations/annotation_mig.go
+++ b/pkg/services/sqlstore/migrations/annotation_mig.go
@@ -184,13 +184,13 @@ func addAnnotationMig(mg *Migrator) {
 		Postgres("ALTER TABLE annotation ALTER COLUMN tags TYPE VARCHAR(4096);").
 		Mysql("ALTER TABLE annotation MODIFY tags VARCHAR(4096);"))
 
-	mg.AddMigration("Increase prev_state column to length 40", NewRawSQLMigration("").
-		Postgres("ALTER TABLE annotation ALTER COLUMN prev_state TYPE VARCHAR(40);").
-		Mysql("ALTER TABLE annotation MODIFY prev_state VARCHAR(40);"))
+	mg.AddMigration("Increase prev_state column to length 40 not null", NewRawSQLMigration("").
+		Postgres("ALTER TABLE annotation ALTER COLUMN prev_state TYPE VARCHAR(40);"). // Does not modify nullability.
+		Mysql("ALTER TABLE annotation MODIFY prev_state VARCHAR(40) NOT NULL;"))
 
-	mg.AddMigration("Increase new_state column to length 40", NewRawSQLMigration("").
-		Postgres("ALTER TABLE annotation ALTER COLUMN new_state TYPE VARCHAR(40);").
-		Mysql("ALTER TABLE annotation MODIFY new_state VARCHAR(40);"))
+	mg.AddMigration("Increase new_state column to length 40 not null", NewRawSQLMigration("").
+		Postgres("ALTER TABLE annotation ALTER COLUMN new_state TYPE VARCHAR(40);"). // Does not modify nullability.
+		Mysql("ALTER TABLE annotation MODIFY new_state VARCHAR(40) NOT NULL;"))
 }
 
 type AddMakeRegionSingleRowMigration struct {