MAM 7.6.1.2 (Oracle 19c):

I have a simple ad-hoc report:


As an experiment:
I want to export the report, make a minor adjustment to the .rptdesign XML, and then import the report as a new report.

Reason:
It's easier to create reports via the ad-hoc report functionality than it is to create custom BIRT reports. I want to create an ad-hoc report, but make a minor adjustment to the SQL that isn't supported by the ad-hoc UI. And then import the report back into Maximo.
It's ok if the imported report isn't treated as an ad-hoc report by Maximo going forward.

Steps:
1. Create the ad-hoc report.
2. Report Administration --> Export Report.
3. Extract the Zip file.
4. Rename the .rptdesign file as WOTRACK_copy.rptdesign.
5. Make minor adjustment to .rptdesign XML/SQL. I'm going to skip this step for now, just to simplify the test.
6. Create a new report in Report Administration UI. (The new report isn't saved yet.)
7. Import the report:

8. OK
9. The file appears to have imported successfully to the unsaved report:

9. Save the new report. I get an error:
BMXAA4211E - Database error number 1 has occurred when operating on REPORT : Application=WOTRACK TEST Report File Name=WOTRACK_copy.rptdesign. Report the error to the owner of the deployment.

Question:
Why am I getting that error?