ref with a "This Entry is Invalid" red warning

Hi, I have an issue here, perhaps a silly one.

I have 2 tables: Propiedades and Galeria Fotos.

The second one has a reference to the first one, in order to add a button where I can open the Galeria Fotos to add some pics.

The key is a unique ID in both tables.

Until here, everything its OK, works just fine.

But, when I try to ad a Picture, theres a red warning “This Entry is Invalid”.

When I try to add a pic not from the parent view (Propiedades) and directly from Galeria Fotos, everything its Ok

What can I do in order to solve this issue?

How are you adding the picture in the 1st case? How is the ref value being populated? It looks greyed-out in your screenshot, i.e. not editable, is it an initial value?

Your key column doesn’t appear to be set properly in the parent table.

Please show us the “Propiedad” column configuration )mainly the source table for the REF and what you have implemented in the “Valid_If” property under the “Data Validity” section of the column config.