diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/DBHelper.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/DBHelper.kt
index 26a834b9a..c9ad934da 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/DBHelper.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/DBHelper.kt
@@ -139,7 +139,10 @@ class DBHelper private constructor(val context: Context) : SQLiteOpenHelper(cont
                 createExceptionsTable(db)
             } catch (ignored: SQLiteException) {
             }
-            db.execSQL("ALTER TABLE $EXCEPTIONS_TABLE_NAME ADD COLUMN $COL_CHILD_EVENT_ID INTEGER NOT NULL DEFAULT 0")
+            try {
+                db.execSQL("ALTER TABLE $EXCEPTIONS_TABLE_NAME ADD COLUMN $COL_CHILD_EVENT_ID INTEGER NOT NULL DEFAULT 0")
+            } catch (ignored: SQLiteException) {
+            }
         }
     }