The function was interpreting that the elements that were expected to be detached contained useful user errors, and therefore it was not detaching them. Also, the function tried to compare the namespace between two models, but the namespace is already fused in the references at detach time.
PiperOrigin-RevId: 651738364
Change-Id: Ifdaa9bd5b658bfd18b544b7138a5c2c56b66e936