violation: 1452Cannotadd or update a childrow: a foreignkeyconstraint fails (`invoiceninja`.`#sq
l-418_46`, CONSTRAINT `payments_invoice_id_foreign` FOREIGNKEY (`invoice_id`
violation: 1452Cannotadd or update a childrow: a foreignkeyconstraint fails (`meetmount`.`#sql-3c8_424`, CONSTRAINT `events_catego
ry_id_foreign` FOREIGNKEY (`category_id`)
, 'Cannotadd or update a childrow: a foreignkeyconstraint fails (`test_current`.=4
error when running tests: IntegrityError: (1452, 'Cannotadd or update a childrow
我想用以下代码在MySQL数据库中添加一个约束: ADDCONSTRAINT `fk_art_grp` FOREIGNKEY (`groepsid类型: int(10)排序规则:空属性:无符号Null:无默认值: None#1452 - Cannotadd or update a childrow: a foreign</e