Class-C ACK:TOO_EARLY about packet_forwarder HOT 5 CLOSED

JSON down: {"txpk":{"time":"2016-09-13T16:05:15.286674Z","size":15,"rfch":0,"modu":"LORA","ipol":"true","imme":"true","freq":433.3,"datr":"SF12BW125","data":"YAgAAAEAfAACiPydFEuT","codr":"4/5"}}
INFO: [down] a packet will be sent on timestamp value 2093252875 (calculated from UTC time)
src/jitqueue.c:314:jit_enqueue(): ERROR: Packet REJECTED, timestamp seems wrong, too much in advance (current=2094548812, packet=2093252875, type=1)
ERROR: Packet REJECTED (jit error=2)
...

JSON down: {"txpk":{"time":"2016-09-13T16:07:13.556752Z","size":15,"rfch":0,"modu":"LORA","ipol":"true","imme":"true","freq":433.3,"datr":"SF12BW125","data":"YAgAAAEAfQACjOE/P1k0","codr":"4/5"}}
INFO: [down] a packet will be sent on timestamp value 2212252905 (calculated from UTC time)
src/jitqueue.c:314:jit_enqueue(): ERROR: Packet REJECTED, timestamp seems wrong, too much in advance (current=2212818957, packet=2212252905, type=1)
ERROR: Packet REJECTED (jit error=2)
...