Problem deleting records with a read-only grid

Hi! I have a site page created from a record list (invoices)

When I click in one of the Invoices Id, I access to a summary view (interface), in which I created not only additional information of the record "invoices", but also a read-only grid from another record (Invoice Lines).

My problem here is that, if I try to eliminate the record (related record action) from this interface, it does not occur anything and the following error appears

I suppose it is caused because of the read-only grid generated in the interface (if I add no editable grid, it works fine). How can I solve this and being able to delete the invoices with the read-only grid inside?

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