See the correct procedure below:
1. Remove the NSX data source from the AON UI.
a) Navigate to Account and datasource page in VCF Operations for Networks GUI.
b) Select the NSXT datasource in question, edit the datasource, under section Additional details, uncheck the DFWIPFIX check box.
You will get another pop up which you need to Click on I Acknowledge.
c) Submit the NSX datasource button.
d) Navigate to NSX GUI , Click on Plan and Troubleshoot>IPFix
e) You should see that the profiles for vrni-Ipfix under Tab DFWIPFIX and Collector should disappear.
f) Navigate back to Account and datasource page in VCF Operations for Networks GUI.
g) Disable the data collection toggle.
h) Click 3 dots on the NSXT Manager in question and select delete datasource.
2. Wait approximately two to three hours.
3. Re-add the NSX data source to the AON UI.
See Documentation hyperlinked below:
Follow Procedure mentioned in documentation mentioned under Procedure section at
Add VMware NSX-T Manager