Dropdown Error

Hi ,

i am getting this error after selecting a dropdown value :-

Expression evaluation error [evaluation ID = GUC5I] in rule 'td_additemforbasicdetails' (called by rule 'td_tenderdetailsmaster') : Error in a!forEach() expression during iteration 1:

Expression evaluation error at function a!dropdownField [line 57]:

A dropdown component [label=""] has an invalid value for "value". All selected values must be present in the choiceValues array, but value was 37 and choiceValues was 32; 34; 36; 37; 38.

How can i resolve this ?