diff --git a/gems/activemodel/6.0/activemodel-6.0.rbs b/gems/activemodel/6.0/activemodel-6.0.rbs
new file mode 100644
index 00000000..d62fc2df
--- /dev/null
+++ b/gems/activemodel/6.0/activemodel-6.0.rbs
@@ -0,0 +1,10 @@
+module ActiveModel
+  class Errors
+    # Delete messages for +key+. Returns the deleted messages.
+    #
+    #   person.errors[:name]        # => ["cannot be nil"]
+    #   person.errors.delete(:name) # => ["cannot be nil"]
+    #   person.errors[:name]        # => []
+    def delete: (untyped key) -> untyped
+  end
+end
diff --git a/gems/activemodel/6.0/activemodel-generated.rbs b/gems/activemodel/6.0/activemodel-generated.rbs
index a751383e..0334de32 100644
--- a/gems/activemodel/6.0/activemodel-generated.rbs
+++ b/gems/activemodel/6.0/activemodel-generated.rbs
@@ -1411,13 +1411,6 @@ module ActiveModel
 
     alias key? include?
 
-    # Delete messages for +key+. Returns the deleted messages.
-    #
-    #   person.errors[:name]        # => ["cannot be nil"]
-    #   person.errors.delete(:name) # => ["cannot be nil"]
-    #   person.errors[:name]        # => []
-    def delete: (untyped key) -> untyped
-
     # When passed a symbol or a name of a method, returns an array of errors
     # for the method.
     #
@@ -2901,9 +2894,6 @@ module ActiveModel
   module Type
     attr_accessor self.registry: untyped
 
-    # Add a new type to the registry, allowing it to be gotten through ActiveModel::Type#lookup
-    def self.register: (untyped type_name, ?untyped? klass, **untyped options) { () -> untyped } -> untyped
-
     def self.lookup: (*untyped args, **untyped kwargs) -> untyped
 
     def self.default_value: () -> untyped
diff --git a/gems/activemodel/6.0/activemodel.rbs b/gems/activemodel/6.0/activemodel.rbs
index 92e5f202..a5731cdc 100644
--- a/gems/activemodel/6.0/activemodel.rbs
+++ b/gems/activemodel/6.0/activemodel.rbs
@@ -366,6 +366,13 @@ module ActiveModel
   end
 end
 
+module ActiveModel
+  module Type
+    # Add a new type to the registry, allowing it to be gotten through ActiveModel::Type#lookup
+    def self.register: (untyped type_name, ?untyped? klass, **untyped options) ?{ () -> untyped } -> untyped
+  end
+end
+
 module ActiveModel
   module Validations
     module ClassMethods
diff --git a/gems/activemodel/7.0/activemodel-7.0.rbs b/gems/activemodel/7.0/activemodel-7.0.rbs
index 13680671..19a25142 100644
--- a/gems/activemodel/7.0/activemodel-7.0.rbs
+++ b/gems/activemodel/7.0/activemodel-7.0.rbs
@@ -42,3 +42,14 @@ module ActiveModel
     def strict_match?: (Symbol | String attribute, (Symbol | String)? type, **untyped options) -> bool
   end
 end
+
+module ActiveModel
+  class Errors
+    # Delete messages for +key+. Returns the deleted messages.
+    #
+    #   person.errors[:name]        # => ["cannot be nil"]
+    #   person.errors.delete(:name) # => ["cannot be nil"]
+    #   person.errors[:name]        # => []
+    def delete: (untyped key, ?untyped type, **untyped) -> untyped
+  end
+end
diff --git a/gems/activemodel/7.1/activemodel-7.1.rbs b/gems/activemodel/7.1/activemodel-7.1.rbs
index 4c53dfcc..74334fa3 100644
--- a/gems/activemodel/7.1/activemodel-7.1.rbs
+++ b/gems/activemodel/7.1/activemodel-7.1.rbs
@@ -66,6 +66,17 @@ module ActiveModel
   end
 end
 
+module ActiveModel
+  class Errors
+    # Delete messages for +key+. Returns the deleted messages.
+    #
+    #   person.errors[:name]        # => ["cannot be nil"]
+    #   person.errors.delete(:name) # => ["cannot be nil"]
+    #   person.errors[:name]        # => []
+    def delete: (untyped key, ?untyped type, **untyped) -> untyped
+  end
+end
+
 module ActiveModel
   module Model
     include ActiveModel::Access