Message type: E = Error
Message class:  CNV_00001 - Message class for CWB settings maintenance programs 
Message number: 307
Message text: Changes made to table &1 settings were saved.
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_00001307 indicates that changes made to the settings of a specific table (denoted by &1) have been saved. This message is typically associated with the SAP Data Migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
Cause: The message is informational rather than an error. It indicates that the system has successfully saved changes to the configuration or settings of a particular table. This could occur during data migration activities where settings for data mapping, transformation, or other configurations are modified.
Solution: Since this message is informational, there is no direct "solution" required. However, if you are seeing this message and it is unexpected, consider the following steps: Review Changes: Check the changes made to the table settings to ensure they are correct and intended. This may involve reviewing the migration settings or configurations. Validation: After saving changes, validate the data to ensure that the migration
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_00001306 &4: object added.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_00001305 New object was added.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_00001308 Settings for table &1 are technically correct.
What causes this issue?  Settings maintained for table &V1& are technically correct. This means that the conversion programs should be generat...
CNV_00001309 Status of table &1 was not checked.
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.