How much to increase the array for L-WS-DATA because of an array overflow issue?

The AM calc failed because of an Internal array overflow, here's the complete message:

 Internal array overflow occurred for array %1 defined in copybook %2 with a max array count of %3 

   %1--> L-WS-DATA           

   %2--> GPCDPDM1            

   %3-->    100           

 EMPLID--> 18470

It is currently set at 100 in GPCDPDM1.cbl

 05 L-WS-DATA             OCCURS 100

                          INDEXED BY WS-IDX.

How much do I increase the array?

Thank you in advance for any assistance.

Maryza