Sql Update Sentence

hello to all!!! i have a quiestion and problem, i need replace a value from a field with other value, i try using this sql sentence:

update packing_acum set corr=corr + 200) BETWEEN 26821 AND 27340 and extract(year from fec_prod) = 2009 AND cod_packing  between 2321 and 2327

but this error appear..

ERROR:  column "corr" is of type numeric but expression is of type boolean
HINT:  You will need to rewrite or cast the expression.
********** Error **********

ERROR: column "corr" is of type numeric but expression is of type boolean
Estado SQL:42804
Sugerencias:You will need to rewrite or cast the expression.


where is the problem??

thx in adv.