MediaWiki:Apihelp-block-param-reblock
If the user is already blocked by a single block, overwrite the existing block. If the user is blocked more than once, this will fail—use the id parameter instead to specify which block to overwrite.
There are 1 incomplete or pending task to finish installation of Semantic MediaWiki. An administrator or user with sufficient rights can complete it. This should be done before adding new data to avoid inconsistencies.
If the user is already blocked by a single block, overwrite the existing block. If the user is blocked more than once, this will fail—use the id parameter instead to specify which block to overwrite.