This means that there more than one table in your SQL reference that has that field name.  For example, let\'s say you are referencing 2 tables.

Table1:
Fields: stereos, dvds, speakers

Table2:
Fileds: computers, keyboards, speakers

You can plainly see that the field names "speakers" exists in both tables.  They are not the same fields though and should be referenced like "Table1.speakers" or "Table2.speakers" to avoid ambiguity.

Most likely you have an "order" clause that references the replicated field name in your SQL syntax somewhere.  Find it and add the preferred "Tablename." to prefix it properly.