AFP time machine error log (any tip for fixing it?)

Quote

Dec 9 01:36:27 Tower afpd[33541]: afp_createfile("3020"): CNID error Dec 9 08:36:38 Tower afpd[33541]: afp_createfile("6148"): CNID error Dec 9 15:48:15 Tower afpd[47589]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 17:30:11 Tower afpd[39327]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 17:31:10 Tower afpd[41795]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 17:33:15 Tower afpd[47014]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 18:41:44 Tower afpd[90094]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 19:49:30 Tower afpd[130379]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 20:57:15 Tower afpd[37413]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 22:08:33 Tower afpd[83985]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 9 23:51:15 Tower afpd[78311]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 10 00:52:15 Tower afpd[99541]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 10 01:56:53 Tower afpd[129835]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 10 03:01:30 Tower afpd[29561]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 10 03:02:28 Tower afpd[31987]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend Dec 10 05:05:55 Tower afpd[77584]: afp_openvol(/mnt/user/time_machine): Fatal error: Unable to get stamp value from CNID backend

I think it causes my time machine backup act abnormally. Does anyone has tip fixing it?

Thank you!