2 files changed, 6 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb
index 174f716152..1a937dbcf7 100644
--- a/activerecord/lib/active_record/gem_version.rb
+++ b/activerecord/lib/active_record/gem_version.rb
@@ -6,9 +6,9 @@ module ActiveRecord
 
   module VERSION
     MAJOR = 5
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
-    PRE   = "beta1"
+    PRE   = "alpha"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activerecord/lib/active_record/migration/compatibility.rb b/activerecord/lib/active_record/migration/compatibility.rb
index 85032ce470..188dd0acef 100644
--- a/activerecord/lib/active_record/migration/compatibility.rb
+++ b/activerecord/lib/active_record/migration/compatibility.rb
@@ -11,7 +11,10 @@ module ActiveRecord
         const_get(name)
       end
 
-      V5_1 = Current
+      V5_2 = Current
+
+      class V5_1 < V5_2
+      end
 
       class V5_0 < V5_1
         module TableDefinition