Cannot delete groups

We get the following error trying to delete Grouper groups via the UI (Browse folders->More Actions->Delete Group):

Error: Why cant deprovisioning def base def be found?, Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, edu.internet2.middleware.grouper.hibernate.ByObject@499761d0, Problem in HibernateSession: HibernateSession (6e385e5b): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (14a0d929), Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, ByObjectStatic, query: ', cacheable: null, cacheRegion: null, entityName: null, tx type: null, Problem in HibernateSession: HibernateSession (3ca80dc4): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (14a0d929), Problem deleting attribute assignValue: AttributeAssignValue.id#939399c455a94b9a9908beb2e54c2eea , Problem in HibernateSession: HibernateSession (2a781695): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (14a0d929), Problem deleting attribute assign: AttributeAssign[id=dd73d24720b247de83c49444215c0668,action=assign,attributeDefName=bath:provisionClass, group=Group[name=XXXXXX,uuid=b8b67b15ce9d4de188d3adebaccbe68d]] , Problem in HibernateSession: HibernateSession (331489b8): new, notReadonly, READ_WRITE_NEW, notActiveTransaction, session (14a0d929), Problem calling method groupDeleteSubmit on edu.internet2.middleware.grouper.grouperUi.serviceLogic.UiV2Group

When we try to delete any attributes on that Group, we get the following error trying to delete the attribute value (Lite UI->Manage Attributes and permissions->View or assign attributes->Owner Type: Group and Owner Group: the group->Filter->then click cross on attribute value):

Error: Why cant deprovisioning def base def be found?, Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, edu.internet2.middleware.grouper.hibernate.ByObject@2b81abd8, Problem in HibernateSession: HibernateSession (917b941): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (7550df8a), Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, ByObjectStatic, query: ', cacheable: null, cacheRegion: null, entityName: null, tx type: null, Problem in HibernateSession: HibernateSession (2007b250): new, notReadonly, READ_WRITE_NEW, notActiveTransaction, session (7550df8a), Problem deleting attribute assignValue: AttributeAssignValue.id#939399c455a94b9a9908beb2e54c2eea , Problem calling method assignValueDelete on edu.internet2.middleware.grouper.grouperUi.serviceLogic.SimpleAttributeUpdate

and the following error trying to delete the attribute itself (Lite UI->Manage Attributes and permissions->View or assign attributes->Owner Type: Group and Owner Group: the group->Filter->then click cross on attribute):

Error: Why cant deprovisioning def base def be found?, Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, edu.internet2.middleware.grouper.hibernate.ByObject@54ace2fc, Problem in HibernateSession: HibernateSession (10215f08): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (1529b3ce), Exception in delete: edu.internet2.middleware.grouper.attr.value.AttributeAssignValue, ByObjectStatic, query: ', cacheable: null, cacheRegion: null, entityName: null, tx type: null, Problem in HibernateSession: HibernateSession (64d018a4): notNew, notReadonly, READ_WRITE_NEW, activeTransaction, session (1529b3ce), Problem deleting attribute assignValue: AttributeAssignValue.id#939399c455a94b9a9908beb2e54c2eea , Problem in HibernateSession: HibernateSession (549302c4): new, notReadonly, READ_WRITE_NEW, notActiveTransaction, session (1529b3ce), Problem deleting attribute assign: AttributeAssign[id=dd73d24720b247de83c49444215c0668,action=assign,attributeDefName=YYYYY, group=Group[name=XXXXX,uuid=b8b67b15ce9d4de188d3adebaccbe68d]] , Problem calling method assignDelete on edu.internet2.middleware.grouper.grouperUi.serviceLogic.SimpleAttributeUpdate

Please let us know if you need any more information. Thanks!