Loop on access sw is Affecting distribution switch uplink

[amir2019]

Hi 

we have a branch office  ( 2  Avaya  ERS4826GTS-pwr+ in stack) connected to our HQ .

here the Toplogy 

HQ -----Avaya  ERS4826GTS-pwr+ in stack 1/25---------VLAN238-------1/2/8    ICX7250-24P in stack 

             Avaya  ERS4826GTS-pwr+in stack 2/25--------VLAN238----------2/2/8    ICX7250-24P in stack 

then 

ICX7250-24P in stack1/2/26---------VLAN238-----1/2/1 ICX7250-24P  -------VLAN 237

                                                                                                             ------VLAN 80

                                                                                                             ------VLAN 238

we have multiple loop issue on VLAN 237  but the problem is that UPLINK on Avaya  ERS4826GTS-pwr to HQ goes down  due to this loop !

can you PLease help preventing the loop to affect the Avaya ERS4826GTS as it put down all the site