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‎05-21-2025 12:31 AM
how to overcome the error "An existing map to this target field already exists", but i am mapping to two different fields like:
purchase_order_line
purchase_order_line.short_description
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‎05-21-2025 11:27 AM
Hi,
The error is occurring because the same target field is being used in two mappings. While the target field is the same, only the reference value field name differs.
The reference value field name is used for target reference fields to indicate which field from the source should be matched, for example, the 'name' field in your reference field's table.
To resolve the issue, ensure that only one mapping is created for this target field.
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‎05-21-2025 12:35 AM - edited ‎05-21-2025 12:35 AM
you have only 1 transform map and you want to set 2 target fields with same source value?
If yes then system is blocking you?
If yes then why not use onBefore transform script for the 2nd field like this
target.fieldName = source.u_fieldname;
If my response helped please mark it correct and close the thread so that it benefits future readers.
Ankur
✨ Certified Technical Architect || ✨ 9x ServiceNow MVP || ✨ ServiceNow Community Leader
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‎05-21-2025 12:36 AM
the second field seems to be a dot walked field
share screenshots.
Ankur
✨ Certified Technical Architect || ✨ 9x ServiceNow MVP || ✨ ServiceNow Community Leader
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‎05-21-2025 12:40 AM
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‎05-21-2025 12:41 AM
which are the other field maps?
Did you check any other field map already exist for the same target field?
If my response helped please mark it correct and close the thread so that it benefits future readers.
Ankur
✨ Certified Technical Architect || ✨ 9x ServiceNow MVP || ✨ ServiceNow Community Leader