diff --git a/swh/storage/postgresql/storage.py b/swh/storage/postgresql/storage.py
--- a/swh/storage/postgresql/storage.py
+++ b/swh/storage/postgresql/storage.py
@@ -84,6 +84,7 @@
     psycopg2.errors.NotNullViolation,
     psycopg2.errors.NumericValueOutOfRange,
     psycopg2.errors.UndefinedFunction,  # (raised on wrong argument typs)
+    psycopg2.errors.ProgramLimitExceeded,  # typically person_name_idx
 )
 """Exceptions raised by postgresql when validation of the arguments
 failed."""