RAC upgrade issue from 11.2.0.4 to 19c

while upgrading our RAC system from 11.2.0.4 to 19c we are receiving below error in runcluvfy.sh script.

Error : OCR_VOTE: PRVE-3175 : ASM compatibility for ASM disk group "OCR_VOTE" is set to

     "11.2.0.0.0", which is less than the minimum supported value  "11.2.0.2.0".

when i tried to set the compatibility of ocr_vote disk i get below error

SQL> ALTER DISKGROUP OCR_VOTE SET ATTRIBUTE 'compatible.asm' = '11.2.0.2.0';

ALTER DISKGROUP OCR_VOTE SET ATTRIBUTE 'compatible.asm' = '11.2.0.2.0'

*

ERROR at line 1:

ORA-15032: not all alterations performed

ORA-15260: permission denied on ASM disk group

ORA-15232: cannot advance diskgroup compatibility due to offline disks.