How To Fix AG603 - El material de planif.& está bloqueado (no se puede verificar asignación)

SAP Error Message - Details

• Message type: E = Error

• Message class: AG - Nachrichten ATP-Server

• Message number: 603

• Message text: El material de planif.& está bloqueado (no se puede verificar asignación)

¿Qué causa este problema?

<GL:planning_material>Planning material</> &V1& (plant &V2&), which
belongs to material &V4&, the material that you are processing, has
been locked by user &V3&. The system has unsuccessfully attempted to
lock this material.

Respuesta del sistema

To avoid further delaying your work, the system will terminate its
attempts to lock the material and will not execute an assignment check.

¿Cómo arreglar este error?

Note that the operation you are processing has not been confirmed.
Therefore, you should execute an assignment check
<DS:GLOS.availability_check>(availability check)</> again.

Extracto de mensaje de error del sistema SAP. Copyright SAP SE.