diff --git a/apps/bender/priv/migrations/generator/1770998661693-copy-bindings.sql b/apps/bender/priv/migrations/generator/1770998661693-copy-bindings.sql
index 56289af..ded4001 100644
--- a/apps/bender/priv/migrations/generator/1770998661693-copy-bindings.sql
+++ b/apps/bender/priv/migrations/generator/1770998661693-copy-bindings.sql
@@ -1 +1,4 @@
-INSERT INTO bender_generator_states (id, state) SELECT process_id, aux_state FROM bender_generator_processes;
+INSERT INTO bender_generator_states (id, state)
+SELECT process_id, aux_state
+FROM bender_generator_processes
+WHERE aux_state IS NOT NULL;