select *

from sys.stats so

where so.name = 'Stat_6c8147e7477849589b585591f65b5843'

select s.name as statistics_name

,c.name as column_name

, sc.stats_column_id

from sys.stats as s

inner join sys.stats_columns as sc

       on s.object_id = sc.object_id and s.stats_id = sc.stats_id

inner join sys.columns as c

       on sc.object_id = c.object_id and c.column_id = sc.column_id

where s.object_id = object_id('stg.td_click')

From Here i dropped that statistic and then was able to proceed, notice it is not named like the error, but it worked and allowed me to then alter the column.

drop statistics stg.td_click._WA_Sys_00000010_29D8AC17

Found one similar issue.