Stupid question probably, but I can not connect the two fields. I do not understand why an error occurs.

There is such an error e.png

These are the fields that I want to connect

  • Well here you simply have in the table in a variable field a key that refers to an object in another table. And there is already data in it - Naumov
  • The essence of the problem is that the table on the "many" side contains records that have no corresponding value for the id_test referral field in the table on the "one" side ( test ). Well, it is provided that there are no more foolish reasons - such as a mismatch of type, length, nulls, etc. - Akina

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