This issue is fixed in 9.3.3 and later versions. Until you upgrade your environment to 9.3.3 or later to fix this, remove the command on router that enables options template.
A typical command on Cisco routers would look like:
Remove this on all the routers that are sending options template.
You can check which routers are sending options template by running Wireshark on problematic harvester and decoding the packets as netflow fileds.
Following the below techdoc for details on how to decode packets in Wireshark: