After I checkout code from SVN repository, some of my Eclipse's projects alert this error
"This project needs to migrate WTP metadata"
and it's no provide clue for solve them.
I found this thread Eclipse error: This project needs to migrate WTP metadata
There's a way to solve this error almost bottom of the page.
Just right-click at alerting project and click "Validate"
Then the problem must be solved
This link and this link explain it really well and concise
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