If a line item name changes in the source, keep the mapping in actions so that it pulls from the new line item name automatically.
Indeed, this is a rare and quite hidden case when a rename of a line-item can generate malfunction in an import action.
Until this will be solved, it is mandatory to check if the line-item it is used as source for an import action.
It was said that this issue was solved, but it is still not solved:
https://community.anaplan.com/t5/Releases/What-s-New-February-10-2018/ba-p/28590
Issue 74688 - "When importing data between modules where a line item in the source module was renamed, data matching was based on the name of the old line item"
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