A retag is your only option now.  The scenario you described, the foreign configuration needed to be imported, not cleared.  Clearing the configuration tells the controller to ignore that configuration from then on.  If you don't have the option to import, then we should have examined why.  I might suspect you have a PERC 5 whose firmware is out of date.  (Your controller log was deleted - upload the file itself somewhere, don't copy/paste its contents, as it becomes unreadable.)   I'm not sure I understand this.  What is your configuration (PD's and VD's)?
We have a DELL 2950 that has two 6 drive total set up as RAID1 and is the boot drive. The other four drives were set up as RAID5. Two of the drives on the RAID5 did not get reseated all the way and the configuration came up as Foreign. The only option we had was to clear configuration. We did that and know the Foreign option is greyed out and will not provide the import option. I have seen some discussion that a retag of the drives may work to get the information. Is the an option. Below is the exported log file.
Retag Drives on DELL PERC 6/I integrated RAID card