because it has a DefiningQuery and no element exists in the element [duplicate]

Answer 1

1. Right click on the edmx file, select Open with, XML editor

2. Locate the entity in the edmx:StorageModels element

3. Remove the DefiningQuery entirely

4. Rename the store:Schema="dbo" to Schema="dbo" (otherwise, the code will generate an error saying the name is invalid) These steps worked for me