pg_admin is creating the SQL for creating / dropping various database objects.
I suggest that the DROP SQL is extended by "IF EXISTS" on objects that support "if exists"
-- DROP TABLE otpflichtfeld;
the SQL in that pane would be
-- DROP TABLE IF EXISTS otpflichtfeld;
best wishes
Harald -- GHUM Harald Massa persuadere et programmare Harald Armin Massa Spielberger Straße 49 70435 Stuttgart 0173/9409607 no fx, no carrier pigeon - LASIK good, steroids bad?