diff --git a/Elwig/Documents/MemberDataSheet.cshtml b/Elwig/Documents/MemberDataSheet.cshtml
index b8494dd..61be083 100644
--- a/Elwig/Documents/MemberDataSheet.cshtml
+++ b/Elwig/Documents/MemberDataSheet.cshtml
@@ -206,7 +206,7 @@
                             <td class="text">@areaCom.GstNr.Replace(",", ", ").Replace("-", "–")</td>
                             <td class="number">@($"{areaCom.Area:N0}")</td>
                             <td class="center">@areaCom.WineCult?.Name</td>
-                            <td class="center">@(areaCom.YearTo == null ? $"ab {areaCom.YearFrom}" : $"{areaCom.YearFrom}–{areaCom.YearTo}")</td>
+                            <td class="center">@(areaCom.YearTo == null ? (areaCom.YearFrom == null ? "unbefristet" : $"ab {areaCom.YearFrom}") : (areaCom.YearFrom == null ? $"bis {areaCom.YearTo}" : $"{areaCom.YearFrom}–{areaCom.YearTo}"))</td>
                         </tr>
                         lastContract = contractType.AreaComType.DisplayName;
                     }
diff --git a/Elwig/Helpers/AppDbUpdater.cs b/Elwig/Helpers/AppDbUpdater.cs
index a6606c6..9e2d676 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 = 29;
+        public static readonly int RequiredSchemaVersion = 30;
 
         private static int VersionOffset = 0;
 
diff --git a/Elwig/Helpers/Export/ElwigData.cs b/Elwig/Helpers/Export/ElwigData.cs
index de4d7b0..0faf36a 100644
--- a/Elwig/Helpers/Export/ElwigData.cs
+++ b/Elwig/Helpers/Export/ElwigData.cs
@@ -565,7 +565,7 @@ namespace Elwig.Helpers.Export {
                 KgNr = kgnr,
                 GstNr = json["gstnr"]?.AsValue().GetValue<string>() ?? "-",
                 RdNr = rd?.RdNr,
-                YearFrom = json["year_from"]!.AsValue().GetValue<int>(),
+                YearFrom = json["year_from"]?.AsValue().GetValue<int>(),
                 YearTo = json["year_to"]?.AsValue().GetValue<int>(),
                 Comment = json["comment"]?.AsValue().GetValue<string>(),
             }, newRd ? rd : null);
diff --git a/Elwig/Helpers/Utils.cs b/Elwig/Helpers/Utils.cs
index 6e3d339..e325fc3 100644
--- a/Elwig/Helpers/Utils.cs
+++ b/Elwig/Helpers/Utils.cs
@@ -560,7 +560,7 @@ namespace Elwig.Helpers {
 
         public static Expression<Func<AreaCom, bool>> ActiveAreaCommitments() => ActiveAreaCommitments(CurrentYear);
         public static Expression<Func<AreaCom, bool>> ActiveAreaCommitments(int year) =>
-            c => (c.YearFrom <= year) && (c.YearTo == null || c.YearTo >= year);
+            c => (c.YearFrom == null || c.YearFrom <= year) && (c.YearTo == null || c.YearTo >= year);
 
         public static IQueryable<AreaCom> ActiveAreaCommitments(IQueryable<AreaCom> query) => ActiveAreaCommitments(query, CurrentYear);
         public static IQueryable<AreaCom> ActiveAreaCommitments(IQueryable<AreaCom> query, int year) =>
diff --git a/Elwig/Models/Entities/AreaCom.cs b/Elwig/Models/Entities/AreaCom.cs
index e238f97..4ff65e8 100644
--- a/Elwig/Models/Entities/AreaCom.cs
+++ b/Elwig/Models/Entities/AreaCom.cs
@@ -32,7 +32,7 @@ namespace Elwig.Models.Entities {
         public int? RdNr { get; set; }
 
         [Column("year_from")]
-        public int YearFrom { get; set; }
+        public int? YearFrom { get; set; }
 
         [Column("year_to")]
         public int? YearTo { get; set; }
diff --git a/Elwig/Resources/Sql/29-30.sql b/Elwig/Resources/Sql/29-30.sql
new file mode 100644
index 0000000..08d2705
--- /dev/null
+++ b/Elwig/Resources/Sql/29-30.sql
@@ -0,0 +1,18 @@
+-- schema version 29 to 30
+
+PRAGMA writable_schema = ON;
+
+DROP VIEW v_bki_member;
+CREATE VIEW v_bki_member AS
+SELECT s.year, m.mgnr, m.lfbis_nr, m.name,
+       (COALESCE(m.prefix || ' ', '') || m.given_name || COALESCE(' ' || m.middle_names, '') || COALESCE(' ' || m.suffix, '')) AS other_names,
+       a.name AS billing_name, COALESCE(a.address, m.address) AS address,
+       COALESCE(a.country, m.country) AS country, COALESCE(a.postal_dest, m.postal_dest) AS postal_dest,
+       SUM(COALESCE(IIF((c.year_from IS NULL OR c.year_from <= s.year) AND (c.year_to IS NULL OR c.year_to >= s.year), c.area, NULL), 0)) AS area
+FROM season s, member m
+    LEFT JOIN member_billing_address a ON a.mgnr = m.mgnr
+    LEFT JOIN area_commitment c ON c.mgnr = m.mgnr
+GROUP BY s.year, m.mgnr;
+
+PRAGMA schema_version = 2901;
+PRAGMA writable_schema = OFF;
diff --git a/Elwig/Services/AreaComService.cs b/Elwig/Services/AreaComService.cs
index a1fd9ec..8e4b3d2 100644
--- a/Elwig/Services/AreaComService.cs
+++ b/Elwig/Services/AreaComService.cs
@@ -106,7 +106,7 @@ namespace Elwig.Services {
                 var a = new AreaCom {
                     FbNr = oldFbNr ?? newFbNr,
                     MgNr = (int)vm.MgNr!,
-                    YearFrom = (int)vm.YearFrom!,
+                    YearFrom = vm.YearFrom,
                     YearTo = vm.YearTo,
                     VtrgId = vm.AreaComType!.VtrgId,
                     CultId = vm.WineCult?.CultId,
diff --git a/Tests/fetch-resources.bat b/Tests/fetch-resources.bat
index 4c62384..8092376 100644
--- a/Tests/fetch-resources.bat
+++ b/Tests/fetch-resources.bat
@@ -1 +1 @@
-curl --fail -s -L "https://elwig.at/files/create.sql?v=29" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"
+curl --fail -s -L "https://elwig.at/files/create.sql?v=30" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"