A referential integrity constraint violation occurred

Question

I\'m trying to update an existing entity.

I have the following code:

public MamConfiguration_V1 Save(MamConfiguration_V1 item)
{
    mMaMDBEntities.M         


        

Answer 1

Seems like you have some relationship with foreign key field and a navigation property in the item, and those fields have conflicting values. This occurs when you load an entity and its related entities, change the relationship at one end, mark only that end as Modified and attempt to save. Make sure you modify relationship at both ends and mark all the affected entities as Modified before calling SaveChanges.