what is the use of changearray.db and whether the changearray.db can be deleted?

issue:

Disk space over 100%, after clean up, there is a issue when exporting measure.

exportMeasure caught Exception: RpasBTreeException: Error array misalignment detected. Array '/rpas/sbx/eu/domains/liarsa/LIA/F1_LuxuryTop-1/changearray.db/r_ch_mnth.ary' last modified by 'exportMeasure:6646' at 03:14:22.308 06/21/2021.

fixarray/reshaparray/scandomain, such Oracle commands cannot solve the issue.

so i try to remove the wrong changearray.db.

my fix steps:

remove the changearray.db and then exportMeasure succcessfully.

my question:

pls help to check my solution is available and what it the meaning of changearray.db.

thanks in advance

thanks,

alisa