Invalid ID problems

I’m having some issues with some old .CDR files and CorelDRAW X6.

One file will open but I get a message there is an invalid fill ID. I click on Ignore & the file opens. I searched but so far have not found an answer. I get Google results that pertain to other CorelDRAW versions with options I do not have.

Also that file and two other old .CDR files I saved as SVG files. However the SVG Export screen gives me General information and it states there are 2 Issues.

The upper box states:
Invalid IDs found
Non-RGB colors

The lower box states:
Details: One or more IDs used are either duplicates or contain invalid syntax.
Suggestions: Check all group, object & symbol instance names to ensure they are not duplicated within the file & do not start with a number. Duplicate & invalid IDs will automatically be appended on export.

Again, I did some searching but could not find anything on correcting these issues.

Any & all suggestions would be appreciated.
Thank you.