Hello
1EEDO519 "Table" "M_PREMA" could not be activated
Activate the table M_PREMA from Tx SE11.
If there are errors during the activation check the log and provide the log here.
Also check the ABAP dumps in the system - Tx ST22
Also check whether the runtime object is consistent with the database.
If not fix it by calling Tx SE14 and adjust it.
Also check this SAP Note
Note 1256384 - View/structure not active: Key field of type string
Good Luck
RB