diff --git a/cashu/mint/migrations.py b/cashu/mint/migrations.py
index 1f360f6..b5c373d 100644
--- a/cashu/mint/migrations.py
+++ b/cashu/mint/migrations.py
@@ -338,9 +338,9 @@ async def m012_keysets_uniqueness_with_seed(db: Database):
                     id TEXT NOT NULL,
                     derivation_path TEXT,
                     seed TEXT,
-                    valid_from TIMESTAMP NOT NULL DEFAULT {db.timestamp_now},
-                    valid_to TIMESTAMP NOT NULL DEFAULT {db.timestamp_now},
-                    first_seen TIMESTAMP NOT NULL DEFAULT {db.timestamp_now},
+                    valid_from TIMESTAMP,
+                    valid_to TIMESTAMP,
+                    first_seen TIMESTAMP,
                     active BOOL DEFAULT TRUE,
                     version TEXT,
                     unit TEXT,