How To Fix W0039 - Time slots overlap (start & end &)

W0039 - Overview

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 039

• Message text: Time slots overlap (start & end &)

What causes this issue?

You attempted to assign a wave line a time slot which overlaps with a
time slot already assigned.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Select a new time slot and assign it to the wave line. Make sure there
are no overlaps in the time slots in the line.

Error message extract from SAP system. Copyright SAP SE.

W0039 - Details

• SAP Error Message:
  W0039 - Time slots overlap (start & end &)
  
  
  Cause:
  This warning message occurs when you try to create or maintain time slots (e.g., in work schedules, shift definitions, or time management infotypes) where the defined time intervals overlap each other. In other words, the start and end times of one time slot intersect with those of another, which is not allowed because time slots must be distinct and non-overlapping.
  
  Where it typically occurs:
  
  In Personnel Time Management when defining work schedules or shift times (e.g., in transaction PT01, PT02, or when maintaining infotype 2001 - Absences, or 2002 - Attendances).
  When setting up daily work schedules or weekly work schedules.
  In Factory Calendar or Shift Planning where time intervals are defined.
  
  
  Explanation:
  Time slots represent periods during a day (e.g., 08:00 to 12:00, 13:00 to 17:00). If you define a time slot from 08:00 to 12:00 and another from 11:00 to 15:00, these overlap between