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Asked: 2026-06-04T22:17:29+00:00

I’ll try to explain my problem although to be honest I can’t even understand

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I’ll try to explain my problem although to be honest I can’t even understand it. After many changes in a couple of tables in my DB now I try to create a Foreign key and I’m getting this error when updating the EDMX.

gHOP.msl(410,10) : error 3007: Problem in Mapping Fragments starting at lines 410,
1511: Non-Primary-Key column(s) [UserGUID] are being mapped in both fragments to different conceptual side properties – data
inconsistency is possible because the corresponding conceptual side
properties can be independently modified.

gHOP.msl(1511,6) : error 3012: Problem in Mapping Fragments starting at lines 410, 1511: Data loss is possible in Itinerary.UserGUID.
An Entity with Key (PK) will not round-trip when:
(PK does NOT play Role ‘Itinerary’ in AssociationSet ‘FK_Itinerary_Users’ AND PK is in ‘Itinerary’ EntitySet)

gHOP.msl(410,10) : error 3012: Problem in Mapping Fragments starting at lines 410, 1511: Data loss is possible in Itinerary.UserGUID.
An Entity with Key (PK) will not round-trip when:
(PK is in ‘Itinerary’ EntitySet AND PK does NOT play Role ‘Itinerary’ in AssociationSet ‘FK_Itinerary_Users’ AND Entity.UserGUID
is not NULL)

Honestly, it’s been a nightmare because I can’t understand what’s going on. Although I’ve given up and I won’t create the FK if someone could at least give me a hint I would really appreciate it.

Thanks

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1 Answer

  1. Editorial Team

    Not sure how much access/control you have over the model but I’ve encountered similar issues before when updating entities in the db and then attempting to update the model. I usually just delete the entities from the model which you edited in the db! Rebuild without them. Then re-add them after the build. I find that Visual Studio is not always successful updating the model when structural/relational changes have been made in the db.

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