Change deduplication order of tootctl maintenance fix-duplicates (#15923)

Hopefully fixes #15922

Also update support up to latest database schema version

lib/mastodon/maintenance_cli.rb

@@ -14,7 +14,7 @@ module Mastodon
     end
 
     MIN_SUPPORTED_VERSION = 2019_10_01_213028
-    MAX_SUPPORTED_VERSION = 2020_12_18_054746
+    MAX_SUPPORTED_VERSION = 2021_03_08_133107
 
     # Stubs to enjoy ActiveRecord queries while not depending on a particular
     # version of the code/database
@@ -142,7 +142,6 @@ module Mastodon
       @prompt.warn 'Please make sure to stop Mastodon and have a backup.'
       exit(1) unless @prompt.yes?('Continue?')
 
-      deduplicate_accounts!
       deduplicate_users!
       deduplicate_account_domain_blocks!
       deduplicate_account_identity_proofs!
@@ -157,6 +156,7 @@ module Mastodon
       deduplicate_media_attachments!
       deduplicate_preview_cards!
       deduplicate_statuses!
+      deduplicate_accounts!
       deduplicate_tags!
       deduplicate_webauthn_credentials!