Fout [IS PROVINCIE]: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'beste_kdv.beste_plaatsen_provincies.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
In query: SELECT * FROM beste_kdv.beste_plaatsen_provincies WHERE provincie = 'kinderdagverblijven-provincie-overijssel' GROUP BY provincie LIMIT 1