Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 403
Message text: All cash journal transaction texts for target CoCd &1 are unique
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_20200_CHECK403 indicates that there is an issue with cash journal transaction texts in the context of a data migration or conversion process. Specifically, the error states that all cash journal transaction texts for the target Company Code (CoCd) are unique, which suggests that there may be a problem with how the data is being processed or transformed during the migration.
Cause: Data Uniqueness Requirement: The error typically arises when the system expects certain transaction texts to be unique for the target Company Code, but the data being processed does not meet this requirement. Data Mapping Issues: There may be issues with how the source data is mapped to the target structure, leading to conflicts or duplicates. Configuration Settings: The configuration settings for cash journal transactions in the target system may not align with the incoming data.
Solution: Review Data: Check the source data for cash journal transactions to ensure that the transaction
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20200_CHECK402 All texts for cjtrans in company code &1 are maintained in language &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20200_CHECK401 &1 entries for language &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20200_CHECK404 Target company code &1 contains not unique CJTRANS texts
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20200_CHECK405 Source CoCd &1, source CJTRANS number &2, source text &3, target text &4
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.