diff --git a/packages/postgres-database/src/simcore_postgres_database/migration/versions/42ec7816c0b4_computational_collection_runs.py b/packages/postgres-database/src/simcore_postgres_database/migration/versions/42ec7816c0b4_computational_collection_runs.py
index b828e57e5535..75bc05590371 100644
--- a/packages/postgres-database/src/simcore_postgres_database/migration/versions/42ec7816c0b4_computational_collection_runs.py
+++ b/packages/postgres-database/src/simcore_postgres_database/migration/versions/42ec7816c0b4_computational_collection_runs.py
@@ -53,7 +53,7 @@ def upgrade():
         unique=False,
     )
     op.add_column(
-        "comp_runs", sa.Column("collection_run_id", sa.String(), nullable=False)
+        "comp_runs", sa.Column("collection_run_id", sa.String(), nullable=True)
     )
     op.create_unique_constraint(
         "comp_runs_project_collection_run_id_unique_constraint",