This thread is resolved. Here is a description of the problem and solution.
The Classic Translation Editor shows default language content already deleted.
1 - Finish the translation job and then delete it
Finish the current translation with any fake content and then click to mark it as 100% complete, after that you can delete the entire translated page.
1.2 - Click to edit the translation and fill all the content with any sample content then check all the fields as complete and click to save and finish it.
1.2 - Now, click to list all the pages and then change to the secondary language using the top admin bar language switcher.
1.3 - You should see the translated page in the page listing, using the default WordPress features move it to trash and then delete it permanently.
1.4 - Add a new translation as usual.
2 - Cancel the translation job
2.1 - A WordPress Dashboard > WPML > Translation Management click the 'Translation Jobs' tab and cancel the problematic translation using the red 'times' icon.
2.2 - Resend this page for translation as usual.
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