diff --git a/src/main/resources/sql/fixtures/01-user.sql b/src/main/resources/sql/fixtures/01-user.sql
index 9bc6ea2..2dd9151 100644
--- a/src/main/resources/sql/fixtures/01-user.sql
+++ b/src/main/resources/sql/fixtures/01-user.sql
@@ -4,7 +4,6 @@ declare
     _password text := crypt('azerty', gen_salt('bf', 8));
     multiple int = coalesce(current_setting('fixture.quantity.multiple', true), '50')::int;
 begin
-    delete from "user";
     insert into "user" (id, username, password, blocked_at, roles)
     select
         uuid_in(md5('user'||rn::text)::cstring),
diff --git a/src/main/resources/sql/fixtures/02-citizen.sql b/src/main/resources/sql/fixtures/02-citizen.sql
index fafc9a8..57fb2a6 100644
--- a/src/main/resources/sql/fixtures/02-citizen.sql
+++ b/src/main/resources/sql/fixtures/02-citizen.sql
@@ -1,7 +1,6 @@
 do
 $$
 begin
-    delete from citizen;
     insert into citizen (id, name, birthday, user_id, vote_anonymous, follow_anonymous, email)
     select
         uuid_in(md5('citizen'||row_number() over ()::text)::cstring),
diff --git a/src/main/resources/sql/fixtures/03-workgroup.sql b/src/main/resources/sql/fixtures/03-workgroup.sql
index 631e9de..832a248 100644
--- a/src/main/resources/sql/fixtures/03-workgroup.sql
+++ b/src/main/resources/sql/fixtures/03-workgroup.sql
@@ -8,9 +8,6 @@ declare
     }
     $roles$;
 begin
-    delete from citizen_in_workgroup;
-    delete from workgroup;
-
     insert into workgroup (id, created_by_id, name, description, anonymous)
     select
         uuid_in(md5('workgroup'||rn::text)::cstring),
diff --git a/src/main/resources/sql/fixtures/04-article.sql b/src/main/resources/sql/fixtures/04-article.sql
index fe2bfdc..302f18d 100644
--- a/src/main/resources/sql/fixtures/04-article.sql
+++ b/src/main/resources/sql/fixtures/04-article.sql
@@ -11,9 +11,6 @@ declare
     _citizen_count int = (select count(z) from citizen z);
     _workgroup_count int = (select count(w) from workgroup w);
 begin
-    delete from article_relations;
-    delete from article;
-
     insert into article (id, version_id, created_by_id, workgroup_id, title, anonymous, content, description, tags, created_at, draft)
     select
         uuid_in(md5('article'||row_number() over ())::cstring),
diff --git a/src/main/resources/sql/fixtures/05-constitution.sql b/src/main/resources/sql/fixtures/05-constitution.sql
index 1c6e4c7..65ed9fc 100644
--- a/src/main/resources/sql/fixtures/05-constitution.sql
+++ b/src/main/resources/sql/fixtures/05-constitution.sql
@@ -3,10 +3,6 @@ $$
 declare
     article_count int = (select count(*) from article);
 begin
-    delete from article_in_title;
-    delete from title;
-    delete from constitution;
-
     insert into constitution (id, version_id, created_by_id, title, anonymous, created_at)
     select
         uuid_in(md5('constitution'||row_number() over ())::cstring),
diff --git a/src/main/resources/sql/fixtures/06-follow.sql b/src/main/resources/sql/fixtures/06-follow.sql
index 3043cc4..e17b355 100644
--- a/src/main/resources/sql/fixtures/06-follow.sql
+++ b/src/main/resources/sql/fixtures/06-follow.sql
@@ -3,8 +3,6 @@ $$
 declare
     article_count int = (select count(*) from article);
 begin
-    delete from follow;
-
     insert into follow_article (id, created_by_id, target_id)
     select
         uuid_in(md5('follow_article'||row_number() over ())::cstring),
diff --git a/src/main/resources/sql/fixtures/07-comment.sql b/src/main/resources/sql/fixtures/07-comment.sql
index 930aad4..e2776b5 100644
--- a/src/main/resources/sql/fixtures/07-comment.sql
+++ b/src/main/resources/sql/fixtures/07-comment.sql
@@ -3,8 +3,6 @@ $$
 declare
     article_count int = (select count(*) from article);
 begin
-    delete from comment;
-
     insert into comment_on_article (id, created_by_id, target_id, content)
     select
         uuid_in(md5('comment_on_article'||row_number() over ())::cstring),
diff --git a/src/main/resources/sql/fixtures/08-vote.sql b/src/main/resources/sql/fixtures/08-vote.sql
index ccf37a3..28c0a63 100644
--- a/src/main/resources/sql/fixtures/08-vote.sql
+++ b/src/main/resources/sql/fixtures/08-vote.sql
@@ -3,11 +3,6 @@ $$
 declare
     article_count int = (select count(*) from article);
 begin
-    delete from vote_for_article;
-    delete from vote_for_constitution;
-    delete from vote_for_comment_on_article;
-    delete from vote_for_comment_on_constitution;
-
     insert into vote_for_article (id, created_by_id, target_id, note, anonymous)
     select
         uuid_in(md5('vote_for_article'||row_number() over ())::cstring),
diff --git a/src/main/resources/sql/fixtures/09-opinion.sql b/src/main/resources/sql/fixtures/09-opinion.sql
index 9665b52..7965f56 100644
--- a/src/main/resources/sql/fixtures/09-opinion.sql
+++ b/src/main/resources/sql/fixtures/09-opinion.sql
@@ -3,9 +3,6 @@ $$
 declare
     article_count int = (select count(*) from article);
 begin
-    delete from opinion_on_article;
-    delete from opinion_choice;
-
     insert into opinion_choice (id, name, target)
     select
            uuid_in(md5('opinion_choice'||row_number() over ())::cstring),