diff --git a/docs/content/dev/db-schema.plantuml b/docs/content/dev/db-schema.plantuml
index 80a86a6d5..98ff6a3cb 100644
--- a/docs/content/dev/db-schema.plantuml
+++ b/docs/content/dev/db-schema.plantuml
@@ -74,7 +74,7 @@ entity "revision" {
 entity "authorship" {
   *id : uuid <<generated>>
   --
-  *userId : uuid <FK user>>
+  *authorId : uuid <FK user>>
   *startPos : number
   *endPos : number
   *createdAt : date
@@ -86,11 +86,12 @@ entity "revision_authorship" {
   *authorshipId : uuid <<FK authorship>>
 }
 
-entity "author_colors" {
-  *noteId : uuid <<FK note>>
-  *userId : uuid <<FK user>>
+entity "author" {
+  *id : number <<generated>>
   --
   *color : text
+  sessionID : text <<FK session>>
+  userId : uuid <<FK user>>
 }
 
 
@@ -148,22 +149,23 @@ entity "history_entry" {
   *updatedAt: date
 }
 
-user "1" -- "0..*" note: owner
+user "0..1" -- "0..*" note: owner
 user "1" -u- "1..*" identity
 user "1" -l- "1..*" auth_token: authTokens
 user "1" -r- "1..*" session
 user "1" -- "0..*" media_upload
-user "1" - "0..*" history_entry
+user "1" -- "0..*" history_entry
 user "0..*" -- "0..*" note
-user "1" -- "0..*" authorship
+user "0..1" -- "0..*" author
 
-(user, note) . author_colors
+author "1" -- "0..*" authorship
+author "1" -u- "0..*" session
 
 revision "0..*" -- "0..*" authorship
 (revision, authorship) .. revision_authorship
 
 media_upload "0..*"  -- "1" note
-note "1" - "1..*" revision
+note "1" -d- "1..*" revision
 note "1" - "0..*" history_entry
 note "0..*" -l- "0..*" tag
 note "0..*" -- "0..*" group