ERROR IN RESTORE DATABASE

I made a backup of my database and a restore in a different PC and I am getting the following error message:

 

pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 369; 2612 16386 PROCEDURAL LANGUAGE plpgsql postgres
pg_restore: [archiver (db)] could not execute query: ERROR:  language "plpgsql" already exists
    Command was: CREATE PROCEDURAL LANGUAGE plpgsql;

 

When I open the restored database I can see all of the objects in it: schema, tables, keys, etc. so I do not know what this error means; it seems that everything is fine. I will appreciate any advice.

 

With respect,

Jorge Maldonado