Restore value is greater than keyspace

[MrGuga]

Hello everyone, can anyone point me on how to solve this error? It just happened without any user intervention. Cannot resume either, fails with same error.

(...)

Session..........: sip1
Status...........: Exhausted
Hash.Type........: SIP digest authentication (MD5)
Hash.Target......: $sip$*(edited)
Time.Started.....: Mon Jun 11 16:03:56 2018 (2 secs)
Time.Estimated...: Mon Jun 11 16:03:58 2018 (0 secs)
Guess.Mask.......: ?d?d?d?l?s?d?d?u [8]
Guess.Queue......: 134/40824 (0.33%)
Speed.Dev.#1.....:   964.2 MH/s (7.76ms) @ Accel:32 Loops:31 Thr:256 Vec:1
Recovered........: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.........: 2230800000/2230800000 (100.00%)
Rejected.........: 0/2230800000 (0.00%)
Restore.Point....: 2230800/2230800 (100.00%)
Candidates.#1....: 293d-31Z -> 688q~49Q
HWMon.Dev.#1.....: Util:  0% Core:1258MHz Mem:2000MHz Bus:8

Approaching final keyspace - workload adjusted.

Session..........: sip1
Status...........: Exhausted
Hash.Type........: SIP digest authentication (MD5)
Hash.Target......: $sip$*(edited)
Time.Started.....: Mon Jun 11 16:03:59 2018 (6 secs)
Time.Estimated...: Mon Jun 11 16:04:05 2018 (0 secs)
Guess.Mask.......: ?d?d?d?l?s?d?l?u [8]
Guess.Queue......: 135/40824 (0.33%)
Speed.Dev.#1.....:   908.9 MH/s (8.00ms) @ Accel:32 Loops:31 Thr:256 Vec:1
Recovered........: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.........: 5800080000/5800080000 (100.00%)
Rejected.........: 0/5800080000 (0.00%)
Restore.Point....: 5800080/5800080 (100.00%)
Candidates.#1....: 293v+1mQ -> 688q~4qC
HWMon.Dev.#1.....: Util:  0% Core:1253MHz Mem:2000MHz Bus:8

Restore value is greater than keyspace.

Started: Mon Jun 11 15:45:37 2018
Stopped: Mon Jun 11 16:04:07 2018

Command Line used was:
hashcat64 -a 3 -m 11400 -D 2 --session sip1 sip.txt masks\8char-1l-1u-1d-1s-compliant.hcmask

hashcat Version: 4.1.0

Thanks!