diff --git a/Elwig/Services/InteractionService.cs b/Elwig/Services/InteractionService.cs
index 83acbf2..1e7efef 100644
--- a/Elwig/Services/InteractionService.cs
+++ b/Elwig/Services/InteractionService.cs
@@ -1,3 +1,4 @@
+using Microsoft.Data.Sqlite;
 using Microsoft.Win32;
 using System;
 using System.Collections.Generic;
@@ -117,8 +118,35 @@ namespace Elwig.Services {
 
         public static void ShowException(string title, string? text, Exception exc, bool showExcType = false, bool isError = true) {
             text = text == null ? "" : text + (text.EndsWith('.') || text.EndsWith('!') || text.EndsWith('?') ? "" : ":") + "\n\n";
-            text += exc.Message + (showExcType ? $" ({exc.GetType().Name})" : "");
-            if (exc.InnerException != null) text += "\n\n" + exc.InnerException.Message;
+            if ((exc.InnerException ?? exc) is SqliteException sql) {
+                if (sql.SqliteErrorCode == 5 || sql.SqliteErrorCode == 6) {
+                    // SQLITE_BUSY / SQLITE_LOCKED
+                    text += "Die Datenbank wurde gerade von einem anderen Gerät/Prozess verwendet. Bitte noch einmal versuchen!\n\n" + sql.Message;
+                } else if (sql.SqliteErrorCode == 19) {
+                    // SQLITE_CONSTRAINT
+                    switch (sql.SqliteExtendedErrorCode) {
+                        case 1555:  // SQLITE_CONSTRAINT_PRIMARYKEY - indicating that a PRIMARY KEY constraint failed
+                        case 2067:  // SQLITE_CONSTRAINT_UNIQUE - indicating that a UNIQUE constraint failed
+                        case 2579:  // SQLITE_CONSTRAINT_ROWID - indicating that a rowid is not unique
+                            text += "Dieser Datensatz existiert bereits!\n\n";
+                            break;
+                        case 787:   // SQLITE_CONSTRAINT_FOREIGNKEY - indicating that a foreign key constraint failed
+                        case 1299:  // SQLITE_CONSTRAINT_NOTNULL - indicating that a NOT NULL constraint failed
+                        case 275:   // SQLITE_CONSTRAINT_CHECK - indicating that a CHECK constraint failed
+                        case 1811:  // SQLITE_CONSTRAINT_TRIGGER - indicating that a RAISE function within a trigger fired, causing the SQL statement to abort
+                        case 531:   // SQLITE_CONSTRAINT_COMMITHOOK - indicating that a commit hook callback returned non-zero that thus caused the SQL statement to be rolled back
+                            text += "Der Datensatz ist inkonsistent!\n\n";
+                            break;
+                    }
+                    text += sql.Message;
+                } else {
+                    text += exc.Message + (showExcType ? $" ({exc.GetType().Name})" : "");
+                    if (exc.InnerException != null) text += "\n\n" + exc.InnerException.Message;
+                }
+            } else {
+                text += exc.Message + (showExcType ? $" ({exc.GetType().Name})" : "");
+                if (exc.InnerException != null) text += "\n\n" + exc.InnerException.Message;
+            }
             if (isError) {
                 ShowError(title, text);
             } else {