Two things. The DevAddr has to belong to the network’s NetID; with NetID 000000 that means between 00000000 and 01FFFFFF, otherwise it is refused. And the frame counters: many ABP devices start counting from 0 again after a restart or a battery change, and those frames are dropped as replayed. Hermetry never re-syncs a counter by itself. When you know the meter restarted, use Reset counters on its LoRaWAN tab; the reset goes into the audit log.