Migrating database from old Centos4.x.x to Centos7.x.x

I built a new Centos7 server with the same version of Web HD 12.7.5 Patch1.  When I import the database from the old server I get the following error:

pg_restore: [archiver (db)] Error while PROCESSING TOC:

pg_restore: [archiver (db)] Error from TOC entry 5948; 0 0 COMMENT EXTENSION plpgsql

pg_restore: [archiver (db)] could not execute query: ERROR:  must be owner of extension plpgsql

    Command was: COMMENT ON EXTENSION plpgsql IS 'PL/pgSQL procedural language';

pg_restore: WARNING:  no privileges could be revoked for "public"

pg_restore: WARNING:  no privileges could be revoked for "public"

pg_restore: WARNING:  no privileges were granted for "public"

pg_restore: WARNING:  no privileges were granted for "public"

pg_restore: WARNING:  no privileges were granted for "public"

WARNING: errors ignored on restore: 1