Ath79 image builder problem for wr842n/v1

This suggests that the current firmware is for a TL-MR3020, which is on the "tiny" target for ath79 on master, not a TL-WR842N. Do you recall where the image that is presently on the device came from?

Edit: It also appears to be an "old" image on the device, as the current ath79 device is tplink_mr3020-v1