diff --git a/controller/store/sql/sqlite3/015_v0_4_19_share_unique_name_constraint.sql b/controller/store/sql/sqlite3/015_v0_4_19_share_unique_name_constraint.sql
new file mode 100644
index 00000000..9d60476c
--- /dev/null
+++ b/controller/store/sql/sqlite3/015_v0_4_19_share_unique_name_constraint.sql
@@ -0,0 +1,55 @@
+-- +migrate Up
+
+alter table shares rename to shares_old;
+create table shares (
+    id                        integer             primary key,
+    environment_id            integer             constraint fk_environments_shares references environments on delete cascade,
+    z_id                      string              not null unique,
+    token                     string              not null,
+    share_mode                string              not null,
+    backend_mode              string              not null,
+    frontend_selection        string,
+    frontend_endpoint         string,
+    backend_proxy_endpoint    string,
+    reserved                  boolean             not null default(false),
+    created_at                datetime            not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+    updated_at                datetime            not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')), deleted boolean not null default(false),
+
+    constraint chk_z_id check (z_id <> ''),
+    constraint chk_token check (token <> ''),
+    constraint chk_share_mode check (share_mode == 'public' or share_mode == 'private'),
+    constraint chk_backend_mode check (backend_mode == 'proxy' or backend_mode == 'web' or backend_mode == 'tcpTunnel' or backend_mode == 'udpTunnel' or backend_mode == 'caddy' or backend_mode == 'drive')
+);
+CREATE UNIQUE INDEX shares_token_idx ON shares(token) WHERE deleted is false;
+insert into shares select * from shares_old;
+drop table shares_old;
+
+alter table frontends rename to frontends_old;
+create table frontends (
+   id                    integer             primary key,
+   environment_id        integer             references environments(id),
+   token                 varchar(32)         not null unique,
+   z_id                  varchar(32)         not null,
+   public_name           varchar(64)         unique,
+   url_template          varchar(1024),
+   reserved              boolean             not null default(false),
+   created_at            datetime            not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+   updated_at            datetime            not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+   deleted               boolean             not null default(false),
+   private_share_id      integer             references shares(id)
+);
+insert into frontends select * from frontends_old;
+drop table frontends_old;
+
+alter table share_limit_journal rename to share_limit_journal_old;
+create table share_limit_journal (
+    id                  integer                 primary key,
+    share_id            integer                 references shares(id),
+    rx_bytes            bigint                  not null,
+    tx_bytes            bigint                  not null,
+    action              limit_action_type       not null,
+    created_at          datetime                not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+    updated_at          datetime                not null default(strftime('%Y-%m-%d %H:%M:%f', 'now'))
+);
+insert into share_limit_journal select * from share_limit_journal_old;
+drop table share_limit_journal_old;
\ No newline at end of file