Welcome to the Community,
unless you modified any files on the base disk while it was connected to the helper VM, chances are good to repair the disk chain without major disk corruption in the guest. To be able to find out what needs to be edited, please compress/zip the following files from the VM's folder and attach the resulting archive to a reply post.
- the .vmx file
- the .vmsd file
- all vmware*.log files
- all descriptor .vmdk files
In order to download the descriptor .vmdk files you need to e.g. enable SSH and use WinSCP.
Each virtual disk consists of two files, the descriptor file and the data file. The descriptor file is a small text file with only a few hundred bytes in size.
André