upgrading cache drive

have a g-series hybrid vxrail. attempting to upgrade the cache ssd with bigger drives.first node went off without a hitch.  Second node, I click the hardware replace button, do a health check  and all is good.  Click continue which is "cleaning the disk" after about 5 min or so it errors out, with the following.  Any thoughts?  I have tried again later and still fails.

Thank you,

GB

Disk clean-up failed. Resolve the issue(s) and try again.

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