mariadb cannot load

[akabe]

/home/opam/.opam/4.04.1/lib/ocaml/unix.cma: loaded
/home/opam/.opam/4.04.1/lib/ocaml/bigarray.cma: loaded
/home/opam/.opam/4.04.1/lib/ocaml/str.cma: loaded
/home/opam/.opam/4.04.1/lib/bytes: added to search path
/home/opam/.opam/4.04.1/lib/ctypes: added to search path
/home/opam/.opam/4.04.1/lib/ctypes/ctypes.cma: loaded
/home/opam/.opam/4.04.1/lib/ctypes/ctypes-top.cma: loaded
/home/opam/.opam/4.04.1/lib/ctypes/cstubs.cma: loaded
/home/opam/.opam/4.04.1/lib/ctypes/ctypes-foreign-base.cma: loaded
/home/opam/.opam/4.04.1/lib/ctypes/ctypes-foreign-unthreaded.cma: loaded
/home/opam/.opam/4.04.1/lib/mariadb_bindings: added to search path
/home/opam/.opam/4.04.1/lib/mariadb_bindings/mariadb_bindings.cma: loaded
/home/opam/.opam/4.04.1/lib/mariadb: added to search path
/home/opam/.opam/4.04.1/lib/mariadb/mariadb.cma: loaded
The files /home/opam/.opam/4.04.1/lib/mariadb/mariadb.cma
and /home/opam/.opam/4.04.1/bin/iocaml.top
disagree over interface Util

[akabe]

Another package mysql works well.