Seems that is just a warning , googling about it and they offer no alternative to replace it
https://stackoverflow.com/questions/57610475/sio-loopback-fast-path-replacement <SL> I suspect that Microsoft is quietly ignoring the API call/settings when used – otherwise, they would have provided explicit language about possible errors being reported.
Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
