Hello Anderson,
If you didn't perform certain table exports prior to your refresh then it will be reading the planning calendar of JEP.
Run tx DB13 and on the upper left of the screen you will see "DBA Planning Calendar". Just below that you will see "System" and there you will probably still see JEP.
To change it: DB13 => Goto => Backend Configuration.
Also follow up on what Subhash has suggested.
KR,
Amerjit