Later on, I found that all the filters disappear in foton.

Eleonora checked that we have archive file in the directory '/opt/rtcds/kamioka/k1/chans/filter_archive/k1fds'. The file used in foton is '/opt/rtcds/kamioka/k1/chans/K1FDS.txt'.

Then Shoda-san helped to check them. 'ls /opt/rtcds/kamioka/k1/chans/filter_archive/k1fds -all' was used to check the date of these files. The latest archived file in that directory was found to be 'K1FDS_201021_164656.txt' However, it was also shown in the terminal that this latest file has size of 3075 (usual size is 107155). We opened the file and found that the latest archived file is actually empty. In the end, we found  'K1FDS_201017_210326.txt' should be the latest useable file.

By using 'cp /opt/rtcds/kamioka/k1/chans/filter_archive/k1fds/K1FDS_201017_210326.txt /opt/rtcds/kamioka/k1/chans/K1FDS.txt', the filters are copied to foton. Now filters also work well!