diff --git a/backend/app/controllers/wiki_pages_controller.rb b/backend/app/controllers/wiki_pages_controller.rb
index 5be2a3c..4943fbf 100644
--- a/backend/app/controllers/wiki_pages_controller.rb
+++ b/backend/app/controllers/wiki_pages_controller.rb
@@ -72,7 +72,7 @@ class WikiPagesController < ApplicationController
 
     return head :unprocessable_entity if title.blank? || body.blank?
 
-    page = WikiPage.new(title:)
+    page = WikiPage.new(title:, created_user: current_user, updated_user: current_user)
 
     if page.save
       message = params[:message].presence
diff --git a/backend/app/models/wiki_page.rb b/backend/app/models/wiki_page.rb
index 04a3b2f..256d4df 100644
--- a/backend/app/models/wiki_page.rb
+++ b/backend/app/models/wiki_page.rb
@@ -3,6 +3,8 @@ require 'set'
 
 class WikiPage < ApplicationRecord
   has_many :wiki_revisions, dependent: :destroy
+  belongs_to :created_user, class_name: 'User'
+  belongs_to :updated_user, class_name: 'User'
 
   has_many :redirected_from_revisions,
            class_name: 'WikiRevision',
diff --git a/backend/app/models/wiki_revision.rb b/backend/app/models/wiki_revision.rb
index 687b113..da6ca7d 100644
--- a/backend/app/models/wiki_revision.rb
+++ b/backend/app/models/wiki_revision.rb
@@ -7,7 +7,7 @@ class WikiRevision < ApplicationRecord
   has_many :wiki_revision_lines, dependent: :delete_all
   has_many :wiki_lines, through: :wiki_revision_lines
 
-  enum kind: { content: 0, redirect: 1 }
+  enum :kind, { content: 0, redirect: 1 }
 
   validates :kind, presence: true
   validates :lines_count, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
diff --git a/backend/app/services/wiki/commit.rb b/backend/app/services/wiki/commit.rb
index 5f1ccbb..c0be98a 100644
--- a/backend/app/services/wiki/commit.rb
+++ b/backend/app/services/wiki/commit.rb
@@ -112,7 +112,7 @@ module Wiki
       end
 
       if missing_rows.any?
-        WikiLine.upsert_all(missing_rows, unique_by: :index_wiki_lines_on_sha256)
+        WikiLine.upsert_all(missing_rows)
         id_by_sha = WikiLine.where(sha256: line_shas).pluck(:sha256, :id).to_h
       end
 
diff --git a/frontend/src/pages/wiki/WikiHistoryPage.tsx b/frontend/src/pages/wiki/WikiHistoryPage.tsx
index ba1d71b..000ce43 100644
--- a/frontend/src/pages/wiki/WikiHistoryPage.tsx
+++ b/frontend/src/pages/wiki/WikiHistoryPage.tsx
@@ -41,30 +41,20 @@ export default () => {
 	  </thead>
 	  <tbody>
 	    {changes.map (change => (
-		<tr key={change.sha}>
+		<tr key={change.revisionId}>
 		  <td>
-		    {change.changeType === 'update' && (
-			<Link to={`/wiki/${ change.wikiPage.id }/diff?from=${ change.pred }&to=${ change.sha }`}>
+		    {change.pred != null && (
+			<Link to={`/wiki/${ change.wikiPage.id }/diff?from=${ change.pred }&to=${ change.revisionId }`}>
 			  差分
 			</Link>)}
 		  </td>
 		  <td className="p-2">
-		    <Link to={`/wiki/${ encodeURIComponent (change.wikiPage.title) }?version=${ change.sha }`}>
+		    <Link to={`/wiki/${ encodeURIComponent (change.wikiPage.title) }?version=${ change.revisionId }`}>
 		      {change.wikiPage.title}
 		    </Link>
 		  </td>
 		  <td className="p-2">
-		    {(() => {
-		      switch (change.changeType)
-		      {
-		      case 'create':
-			return '新規'
-		      case 'update':
-			return '更新'
-		      case 'delete':
-			return '削除'
-		      }
-		    }) ()}
+		    {change.pred == null ? '新規' : '更新'}
 		  </td>
 		  <td className="p-2">
 		    <Link to={`/users/${ change.user.id }`}>
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index f78c85b..46cacce 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -59,29 +59,33 @@ export type User = {
 export type ViewFlagBehavior = typeof ViewFlagBehavior[keyof typeof ViewFlagBehavior]
 
 export type WikiPage = {
-    id:         number
-    title:      string
-    body:       string
-    sha:        string
-    pred?:      string
-    succ?:      string
-    updatedAt?: string }
+    id:             number
+    title:          string
+    createdUserId:  number
+    updatedUserId:  number
+    createdAt:      string
+    updatedAt:      string
+    body:           string
+    revisionId:     number
+    pred:           number | null
+    succ:           number | null }
 
 export type WikiPageChange = {
-    sha:        string
-    pred?:      string
-    succ?:      string
-    wikiPage:   WikiPage
-    user:       User
-    changeType: string
+    revisionId: number
+    pred:       number | null
+    succ:       null
+    wikiPage:   Pick<WikiPage, 'id' | 'title'>
+    user:       Pick<User, 'id' | 'name'>
+    kind:       'content' | 'redirect'
+    message:    string | null
     timestamp:  string }
 
 export type WikiPageDiff = {
-    wikiPageId: number
-    title:      string
-    olderSha:   string
-    newerSha:   string
-    diff:       WikiPageDiffDiff[] }
+    wikiPageId:       number
+    title:            string
+    olderRevisionId:  number | null
+    newerRevisionId:  number | null
+    diff:             WikiPageDiffDiff[] }
 
 export type WikiPageDiffDiff = {
     type:     'context' | 'added' | 'removed'