Hi @Keval ,
The most likely way is to change the default value on the priority field in the dictionary. Since priority is a field on task, you will more than likely need a dictionary override. Begin by right clicking on the priority field label and choose Configure Dictionary.
At the bottom of the task.priority dictionary form, you will see a related list called Dictionary overrides. Create a new record there for the Catalog Task (sc_task) table and set the default value to 4.
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Thanks,
Sandeep
