diff --git a/make/migrations/postgresql/0110_2.8.0_schema.up.sql b/make/migrations/postgresql/0110_2.8.0_schema.up.sql
new file mode 100644
index 000000000..0b4daea1f
--- /dev/null
+++ b/make/migrations/postgresql/0110_2.8.0_schema.up.sql
@@ -0,0 +1,2 @@
+/* remove the redundant data from table artifact_blob */
+delete from artifact_blob afb where not exists (select digest from blob b where b.digest = afb.digest_af);
\ No newline at end of file