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# Changing OpenText PPM Data

Updating OpenText PPM master data directly in the database can cause various errors to occur. We strongly recommend that you not make changes directly to the OpenText PPM database, and instead use the OpenText PPM user interface to make changes.

If you absolutely must update the database directly, it is important that you understand the underlying data model design before you update the tables and views associated with the Multilingual User Interface (MLU). Before you update MLU views or tables, make sure that your Oracle `NLS_LANG` parameter is set to the same language as your OpenText PPM instance. As always, make it a point to check the data in the views and tables before you commit changes to the database. (For information about the OpenText PPM data model, see the Data Model Guide.)

https://admhelp.microfocus.com PPM 8942
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