How I add memory to ldom that locked

I want to add memory an LDOM

I can try that command:

root@base36:~# ldm add-memory 50G vt143

LDom vt143 is locked against modification

that is ldm list output:

#ldm list

NAME       STATE   FLAGS  CONS  VCPU MEMORY  UTIL NORM UPTIME

primary     active   -n-cv- UART  32  64G   0.1% 0.1% 1060d 19h 

vt141      active   -n---- 5141  384  180G   4.8% 4.8% 1036d 

vt142      active   -nr--- 5142  384  384G   1.0% 0.9% 801d 3h 

vt143      active   -nr--- 5143  128  80G   3.9% 3.8% 362d 

I see "r" flag so I want to cancel operation as:

root@base36:~# ldm cancel-operation memdr vt143 

You cannot cancel a memory add operation.

What must I do now?