library version issue

I have a library versioning issue starting on march 29 with commit 8a136d92.

Problem is when trying to run kea-dhcp4:

/usr/bin/kea-dhcp4: error while loading shared libraries: libkea-dhcp_ddns.so.15: cannot open shared object file: No such file or directory

Current version in build is '16' not 15.

ldd on the binary gives:

# ldd /usr/bin/kea-dhcp4  | grep ddns
        libkea-dhcp_ddns.so.16 => /usr/lib/libkea-dhcp_ddns.so.16 (0x00007ff2b3135000)
        libkea-dhcp_ddns.so.15 => not found

Build on arch linux with :

gcc 10.2.0-6
binutils 2.36.1-2
autoconf 2.71-1

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