When is it necessary to copy the chaser.chk file over the truncate.chk file?

Hello everybody, is it necessary to always copy the chaser.chk file over the truncate.chk file when restarting the eventstoreDB?

We already restored a backup doing so, but we also already restarted the eventstoreDB without bothering. Not copying the chaser.chk file over the truncate.chk file the eventstoreDB doesn’t do the initial lengthy check and is up much faster.