Message type: E = Error
Message class:  SAWE_BO_SA - Message class for BO Staff Assignment 
Message number: 017
Message text: Start date &1 must be the same as the end date
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 SAWE_BO_SA017, which states "Start date &1 must be the same as the end date," typically occurs in scenarios where a date range is expected to have the same start and end date, but the values provided do not match. This error is often encountered in various SAP modules, particularly in planning, scheduling, or project management contexts.
Cause: Mismatched Dates: The most common cause of this error is that the start date and end date fields have been filled with different values. The system expects both dates to be identical for the operation being performed. Configuration Settings: In some cases, the configuration settings for the specific transaction or module may require that the start and end dates be the same due to business rules or logic. Data Entry Error: A simple typographical error during data entry can lead to this mismatch.
Solution: Check Date Fields: Review the input fields for the start date
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SAWE_BO_SA016 Start date &1 must not be later than end date
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAWE_BO_SA015 End date &1 is not in the future
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAWE_BO_SA018 Object cannot be locked, since locked by &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAWE_BO_SA019 Assignment period cannot be shortened: &1/&2/&3
What causes this issue?  The forecast entry for assignment object &v1&, employee &v2& and activity type &v3& is locked and the...
Click on this link to search all SAP messages.