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				@@ -430,9 +430,6 @@ public class TenantGroupServiceImpl extends ServiceImpl<TenantGroupMapper, Tenan 
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				                         .set(TenantGroup::getImGroupId, null) 
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				                         .eq(TenantGroup::getId, detail.getTenantGroupId()) 
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				                         .update(); 
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				-                studentDao.update(null, Wrappers.<Student>lambdaUpdate() 
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				-                        .eq(Student::getTenantGroupId, detail.getTenantGroupId()) 
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				-                        .set(Student::getTenantGroupId, -1L)); 
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				             } 
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				         } 
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				         return true; 
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