How to modify a table containing a foreign key

Question

Hi friends,

I have a table named "bon récéption " and which contains a foreign key Id_marche and in the interface of "bon récéption " I filled the combobox of the "libélllé marche"short market the problem is in button modify when I want to modify gives me this error

I will extract here my code and the error

thank you in advance

 

request

 

Form

 

 

 

 

 error