работало прекрасно
"The child/dependent side could not be determined for the one-to-one relationship between 'Entrance.VideoService' and 'VideoService.Entrance'. To identify the child/dependent side of the relationship, configure the foreign key property. If these navigations should not be part of the same relationship configure them without specifying the inverse. See http://go.microsoft.com/fwlink/?LinkId=724062 for more details."
Надо указать кто из них Чайлд через fk
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