diff --git a/src/main/resources/db/migration/V5__create-table-users.sql b/src/main/resources/db/migration/V5__create-table-users.sql
index e965cfb..f5cd354 100644
--- a/src/main/resources/db/migration/V5__create-table-users.sql
+++ b/src/main/resources/db/migration/V5__create-table-users.sql
@@ -1,7 +1,7 @@
 create table users (
 
     id bigint not null auto_increment,
-    login varchar(100) not null,
+    login varchar(100) not null unique,
     password varchar(255) not null,
     
     primary key(id)
diff --git a/src/main/resources/db/migration/V7__create-table-consultations.sql b/src/main/resources/db/migration/V6__create-table-consultations.sql
similarity index 100%
rename from src/main/resources/db/migration/V7__create-table-consultations.sql
rename to src/main/resources/db/migration/V6__create-table-consultations.sql
diff --git a/src/main/resources/db/migration/V6__slter-table-modify-column-users.sql b/src/main/resources/db/migration/V6__slter-table-modify-column-users.sql
deleted file mode 100644
index b808995..0000000
--- a/src/main/resources/db/migration/V6__slter-table-modify-column-users.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-ALTER TABLE users
-MODIFY COLUMN login varchar(250) not null unique;