strip certain data from field - Splunk Community

Getting Data In

my event has a field Transaction:=InpatUPMC_050_Close_WorklistLoad and i am looking to strip the InpatUPMC_050_ part

i tried the rex field=source mode=sed "s/Transaction:=InpatUPMC_050_Close_//g" but does not work.

Try replace function:

| eval source=replace(source, "Transaction:=InpatUPMC_050_Close_", "")

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