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There are multiple scenarios in which this error may message might occur.:
A newer version of a TM match exists
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Another scenario also revolves around Leveraged and ICE matches. This time , you also receive a Leveraged match populated during project analysis. Then, you create a new project with exactly the same source file, and this project also gets the same Leveraged match. You accept the TM match in that second project, which creates causes a new TM entry to be created with the appropriate context, according to your global TM settings:
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