This might help:
1) “Build” menu -> “Rebuild Project“. Sometimes Intellij doesn’t rewrite the classes because they already exist, this way you ask Intellij to rewrite everything.
2) “Run” menu -> “Edit configuration” -> delete the profile -> add back the profile (“Application” if it’s a Java application), choose your main class from the “Main Class” dropdown menu.
3)”Build” menu -> “Rebuild Project“.
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