Deleting subdomain A record with wildcard record in place

I have an A record sub.example.com and another record *.example.com

If I delete sub.example.com A record, will there be any resolution issues if they both point to the same IP address?

I am migrating subdomain records to use wildcard and I want to make sure there is no interruption when I delete sub.example.com

If you have both sub.example.com and *.example.com, per design of the DNS the wildcard kicks into use only for records NOT being sub.example.com.

Once you delete sub.example.com, the wildcard will then match all records, including sub.example.com (after the TTLs have lapsed, but irrelevant if both records in fact have the exact same data anyway).