Message type: E = Error
Message class:  CNV_PE - General messages for posting engine 
Message number: 669
Message text: MSTAE deactivated for material &1. MSTAE value &2
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message "CNV_PE669 MSTAE deactivated for material &1. MSTAE value &2" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the material status (MSTAE) for a specific material is deactivated, which means that the material cannot be processed in the way that the migration or conversion process requires.
Cause: Deactivated Material Status: The material status (MSTAE) for the specified material is set to a value that indicates it is inactive or not allowed for certain operations. Data Migration Issues: The migration process may be trying to process materials that are not in a valid state for the intended operations. Configuration Settings: The system configuration may not allow certain material statuses to be active during the migration process.
Solution: Check Material Status: Go to the material master data for the specified material (using transaction code MM03). Check the material status field (MSTAE)
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_PE668 Handling unit deactivated for plant &1 storage loc. &2. XHUPF value &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE667 Enhancement of TRANS_SUC is not selected. Customizing changes not stored
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE670 MMSTA deactivated for material &1 plant &2. MMSTA value &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE671 QMATV deactivated for material &1 plant &2. QMATV value &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.