0516-066: Physical volume is not a volume group member.

Why i am getting below error?
#lsvg oravg
0516-066: Physical volume is not a volume group member.
Check the physical volume name specified

hdiskpower9 00f64abb7024b22a oravg active
hdiskpower10 00f64abb70216920 oravg active
hdiskpower11 00f64abb701cf0ad oravg active
hdiskpower12 00f64abb701dfefc oravg active

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