Write Conflict in Subform Text Boxes

If, on the startup form of the attached mdb, you type anything in any of the text boxes of the FPersonale subform(which, in form view, is labeled "Shift schedule") you get a message titled "Write Conflict" saying that during the current session the record had been modified by another user, asking to choose between saving the record, copying the edits to the clipboard or discarding the edits.
I've tried to get rid of the message by putting Me.Requery at the end of the text boxes' AfterUpdate event code but the message still pops up.

Thank you Pat, that was very good advice. I carried out putting the two subforms onto the main form but I kept the text/combo boxes in FrmMeteo unbound because if I bound them, you'd have multiple text/combo boxes referring to the same field.