Request clarification before answering.
Please check sap note "1925322 - How to roll back table conversion"
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I upvoted Mukesh's answer because I think it has the right steps to solve your issue.
But to be more specific, here's probably what you need to do
Step 1. Transaction SE14 - Table: MARA - select "Unlock table"
Step 2. Using FM DB_RENAME_TABLE - Pass in Parameter TABNAME_NEW = MARA and TABNAME_OLD = QCMMARA
Step 3. Transaction SE14 - Table: MARA - Select menu Table > Reconstruct
Step 4. (Since you said you've fixed the ZZ-fields error) Go to SE11 and reactivate MARA.
That should do it.
*** DISCLAIMER *** Given the fact that the OP's scenario is dealing with a standard SAP table (MARA), PROCEED AT OWN RISK.
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The note Mukesh shared is in regards if there's a termination at Step 5. My process terminated at Step 4.
Additionally, if I currently go to SE11 to activate "MARA" it gives messages as shown in screenshot.
Note: If I try to unlock table it gives me a warning:
"The original data is currently in a temporary table. For this reason, it is not possible to guarantee that all the data has been converted and copied to the new table. The temporary table is deleted with the next request to adjust the table. As a result, there could be a partial or complete LOSS OF DATA ! If you unlock the table now, the adjustment cannot be continued automatically at a later time. First try to correct the error and continue the adjustment. Use the object log and the sys log (SM21) for an error analysis. Really unlock table ?"
Yeah - okay. The SAP warning is valid. Given the fact that this is a standard SAP table and I don't know if you have a new system or a pretty old system with tons of data, I'd say proceed with caution. Maybe have the DBA backup the data first on the DB level before attempting the steps in the OSS notes?
As for your point about the OSS note Step 5 vs your Step 4, I think the underlying issue is the same. The original DB table has been dropped and no longer exists in DB and you can't activate it. The steps outlined in the OSS note will restore the DB table BUT - the OSS note is dealing with a custom Z-table and you, have a potentially large/huge table.
Again. proceed with caution...
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