Problems dropping outdated index

[ajnavarro]

I got the following message from the shell:

WARN[0000] index "blobs_idx" is outdated and will not be used, you can remove it using `DROP INDEX blobs_idx` 

After that, I tried to remove the index using the specified command:

mysql> drop index blobs_idx;
ERROR 1105 (HY000): unknown error: expecting "on" but got "" instead

It throws an error because the table is not specified, So I tried again adding on blobs:

mysql> drop index blobs_idx on blobs;
ERROR 1105 (HY000): unknown error: index "blobs_idx" is still not ready for usage and can't be deleted

I should be able to delete it.