sane-pixma problem

sane-pixma log

[pixma] Discover response:
[pixma]  00000000:42 4a 4e 50 82 01 00 00  00 00 00 00 00 00 00 10 
[pixma]  00000010:00 01 08 00 06 04 2c 9e  fc 34 95 9d c0 a8 01 27 
[pixma] Found scanner at ip address: 192.168.1.39
[pixma] bjnp_allocate_device(bjnp://192.168.1.39:8612)[pixma] Get scanner identity
[pixma]  00000000:42 4a 4e 50 02 30 00 00  00 00 00 00 00 00 00 00 
[pixma] udp_command: Sending UDP command to 192.168.1.39:8612
[pixma] scanner identity:
[pixma]  00000000:42 4a 4e 50 82 30 00 00  00 00 00 00 00 00 00 67 
[pixma]  00000010:00 67 4d 46 47 3a 43 61  6e 6f 6e 3b 43 4d 44 3a 
[pixma] ......
[pixma] Scanner identity string = MFG:Canon;CMD:MultiPass 2.1,IVEC;MDL:MG3100 series;CLS:IMAGE;DES:Canon MG3100 series;SOJ:BJNP2,BJNPe;ddr.arpa
[pixma] Scanner model = Canon MG3100 series
[pixma] Discover response:
[pixma]  00000000:42 4a 4e 50 82 01 00 00  00 00 00 00 00 00 00 10 
[pixma]  00000010:00 01 08 00 06 04 2c 9e  fc 34 95 9d c0 a8 01 27 
[pixma] Found scanner at ip address: 192.168.1.39
[pixma] bjnp_allocate_device(bjnp://192.168.1.39:8612)[pixma] Scanner at bjnp://192.168.1.39:8612 detected, but it was added before, good!
[pixma] Discover response:
[pixma]  00000000:42 4a 4e 50 82 01 00 00  00 00 00 00 00 00 00 10 
[pixma]  00000010:00 01 08 00 06 04 2c 9e  fc 34 95 9d c0 a8 01 27 
[pixma] Found scanner at ip address: 192.168.1.39
[pixma] bjnp_allocate_device(bjnp://192.168.1.39:8612)[pixma] Scanner at bjnp://192.168.1.39:8612 detected, but it was added before, good!
[pixma] Discover response:
[pixma]  00000000:42 4a 4e 50 82 01 00 00  00 00 00 00 00 00 00 10 
[pixma]  00000010:00 01 08 00 06 04 2c 9e  fc 34 95 9d c0 a8 01 27 
[pixma] Found scanner at ip address: 192.168.1.39
[pixma] bjnp_allocate_device(bjnp://192.168.1.39:8612)[pixma] Scanner at bjnp://192.168.1.39:8612 detected, but it was added before, good!
[pixma] scanner discovery finished...
[pixma] pixma_find_scanners() found 0 devices