Broken parameter on the Content By Label macro breaks the page

Issue Summary

For some reason, some Content by Label macros have the schema-version parameter set to 1, which causes an error and breaks the page. That parameter should be 4.

Steps to Reproduce

So far, we haven't been able to replicate the issue from scratch, but we've received some reports of this issue.

Expected Results

• It shouldn't be possible to have the macro with the wrong schema
• Or it shouldn't break the page

Actual Results

The page can't be viewed, with the "We've hit a snag" error message:

And the following error in the browser's console:

Error: Failed to parse ADF: <div class="error fatal-render-error">Error: Error migrating macro 'contentbylabel' in content 'ContentId{id=12345}' from schema version 1. Message: java.lang.IllegalArgumentException: Unable to migrate contentbylabel parameters
	at ...

Workaround

Update the page's source code using the API and change the following parameter inside the contentbylabel macro:

ac:schema-version="1"

set it to

ac:schema-version="4"

You may contact support and mention this bug report so we can apply the workaround for you.