There are many variants of [https://onlinefilerepair.com/en/coreldraw-repair-online.html|coreldraw] file recovery, but the most easiest are the following...
By guide
Corel makes a .BAK backup file that has the same name and is usually located in the same folder as the original file, but can also be located in the /Programs/Corel/Programs/Draw folder.
When a file is corrupted or otherwise damaged, find the .BAK file, open it, and copy it (save as) over the original corrupted file.
Or by articles, tips, etc...
https://support.corel.com/hc/en-us/articles/216435167-How-To-Recover-Corrupted-CDR-Files
https://support.corel.com/hc/en-us/articles/216435747-Backup-and-Recovery-in-CorelDRAW-X6