diff --git a/dbml/schema.dbml b/dbml/schema.dbml
index 4aeb72b..933f2b4 100644
--- a/dbml/schema.dbml
+++ b/dbml/schema.dbml
@@ -1,4 +1,5 @@
 // https://dbml.dbdiagram.io/docs
+// https://dbdiagram.io/d/Shema-BD-dlya-perevodov-Pf2e-67f0f7de4f7afba18471ab41
 
 // Entity
 Table entity {
@@ -53,8 +54,8 @@ Table keyword {
     
 }
 Table entity_keywords {
-    entity_id int [ref: > entity.id]
-    keyword_id int [ref: > keyword.id]
+    entity_id int [not null, ref: > entity.id]
+    keyword_id int [not null, ref: > keyword.id]
 }
 Table keyword_aliases {
     keyword_id int [pk, ref: > keyword.id]
@@ -69,8 +70,8 @@ Table source {
     url varchar [not null]
 }
 Table entity_sources {
-    entity_id int [ref: > entity.id]
-    source_id int [ref: > source.id]
+    entity_id int [not null, ref: > entity.id]
+    source_id int [not null, ref: > source.id]
     suffix varchar [not null, default: "", note: "страница и проч."]
     is_remaster bool [not null]
 }
@@ -242,9 +243,8 @@ Table background {
     '''
 }
 Table background_items {
-    id int [pk]
-    background_id int [not null, ref: > background.id] 
-    entity_id int [not null, ref: > entity.id, note: "{}.name"]
+    background_id int [pk, ref: > background.id] 
+    entity_id int [pk, ref: > entity.id, note: "{}.name"]
 
     level int [note: "{}.level"]
     // name string [note: "{}.name (?)"]
@@ -583,7 +583,7 @@ Table spell_area {
 }
 Table spell_damage {
     id int [pk, increment]
-    spell_id int [ref: > spell.id]
+    spell_id int [not null, ref: > spell.id]
 
     key varchar [not null, note: "{}.[key]"]
 
@@ -607,7 +607,7 @@ Table spell_ritual {
 }
 Table spell_defense {
     id int [pk, increment]
-    spell_id int [ref: > spell.id]
+    spell_id int [not null, ref: > spell.id]
 
     is_passive bool [not null, note: "true = {}.passive; true = {}.save"]
     is_basic bool [null, note: "{}.save?.basic"]