Extract error

Hi,

Backed out GG from 11.2 to 11.1.

But getting error as below on info all after placing new binaries except dir* directories-

Failed to get next ts for EXTRACT  E_STAR     (error 107, Invalid type (11) retrieving timestamp in )

Alter to a certain point also didn't work, giving below-

GGSCI 2> Alter extract E_STAR, thread 1, extseqno 6411, extrba 202720584

ERROR: Invalid checkpoint type.

Please suggest what to do. Its urgent.

Thanks,

Basu