diff --git a/Elwig/Helpers/AppDbUpdater.cs b/Elwig/Helpers/AppDbUpdater.cs
index a82eae6..110a605 100644
--- a/Elwig/Helpers/AppDbUpdater.cs
+++ b/Elwig/Helpers/AppDbUpdater.cs
@@ -9,7 +9,7 @@ namespace Elwig.Helpers {
     public static class AppDbUpdater {
 
         // Don't forget to update value in Tests/fetch-resources.bat!
-        public static readonly int RequiredSchemaVersion = 20;
+        public static readonly int RequiredSchemaVersion = 21;
 
         private static int VersionOffset = 0;
 
diff --git a/Elwig/Models/Entities/MemberHistory.cs b/Elwig/Models/Entities/MemberHistory.cs
index e968407..ad22a48 100644
--- a/Elwig/Models/Entities/MemberHistory.cs
+++ b/Elwig/Models/Entities/MemberHistory.cs
@@ -3,7 +3,7 @@ using System;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Elwig.Models.Entities {
-    [Table("member_history"), PrimaryKey("MgNr", "DateString")]
+    [Table("member_history"), PrimaryKey("MgNr", "DateString", "Type")]
     public class MemberHistory {
         [Column("mgnr")]
         public int MgNr { get; set; }
@@ -16,12 +16,12 @@ namespace Elwig.Models.Entities {
             set => value.ToString("yyyy-MM-dd");
         }
 
-        [Column("business_shares")]
-        public int BusinessShares { get; set; }
-
         [Column("type")]
         public required string Type { get; set; }
 
+        [Column("business_shares")]
+        public int BusinessShares { get; set; }
+
         [Column("comment")]
         public string? Comment { get; set; }
 
diff --git a/Elwig/Resources/Sql/20-21.sql b/Elwig/Resources/Sql/20-21.sql
new file mode 100644
index 0000000..9ac6adf
--- /dev/null
+++ b/Elwig/Resources/Sql/20-21.sql
@@ -0,0 +1,16 @@
+-- schema version 20 to 21
+
+DROP TABLE member_history;
+CREATE TABLE member_history (
+    mgnr            INTEGER NOT NULL,
+    date            TEXT    NOT NULL CHECK (date REGEXP '^[1-9][0-9]{3}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$') DEFAULT CURRENT_DATE,
+    type            TEXT    NOT NULL CHECK (type REGEXP '^[a-z_]+$'),
+
+    business_shares INTEGER NOT NULL,
+    comment         TEXT DEFAULT NULL,
+
+    CONSTRAINT pk_member_history PRIMARY KEY (mgnr, date, type),
+    CONSTRAINT fk_member_history_member FOREIGN KEY (mgnr) REFERENCES member (mgnr)
+        ON UPDATE CASCADE
+        ON DELETE CASCADE
+) STRICT;
diff --git a/Tests/fetch-resources.bat b/Tests/fetch-resources.bat
index bef7435..13f8221 100644
--- a/Tests/fetch-resources.bat
+++ b/Tests/fetch-resources.bat
@@ -1 +1 @@
-curl --fail -s -L "https://elwig.at/files/create.sql?v=20" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"
+curl --fail -s -L "https://elwig.at/files/create.sql?v=21" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"