You can try do this:
1. Extract content of the OVA file using VMware OVF tool
https://www.unixarena.com/2014/03/vmware-ovf-tool-convert-ova-ovf.html/
2. Create a copy of OVF file in case something goes wrong and open OVF (you can even use default text editor).
Go to line 644 and check what is there.
If you change something in ovf file, you need to do that:
a) Create new SHA1 checksum for updated OVF file.
openssl sha1 <name>.ovf
b) Update the OVF file checksum in manifest file.