Thread:Project:Support desk/from within function "Revision::fetchFromConds". Database returned error "1054: Unknown column 'user name' in 'field list

HELLO ALL,

When i tried to inject the old database into my new mediawiki this is the error i am getting from within function "Revision::fetchFromConds". Database returned error "1054: Unknown column 'user_name' in 'field list .I dont know how to proceed further.Can any one helpme with this.

Thanks in Advance.