Fixing the uid Column isn't unique.

uid is required to be unique for the the Changed Events (with the new Data) to be inserted without creating new Rows.

sql/events/events_create_unique_index_uid.sql

@@ -0,0 +1 @@
+CREATE UNIQUE INDEX idx_events_uid ON events(uid);

sql/events/events_delete_duplicate_rows.sql

@@ -0,0 +1,6 @@
+DELETE FROM events
+WHERE rowid NOT IN (
+  SELECT MIN(rowid)
+  FROM events
+  GROUP BY uid
+);

sql/events/events_find_duplicate_uid.sql

@@ -0,0 +1,4 @@
+SELECT uid, COUNT(*) AS count
+FROM events
+GROUP BY uid
+HAVING COUNT(*) > 1;

sql/sql_migration_v0.1.3.sql

@@ -0,0 +1,29 @@
+DELETE FROM events
+WHERE rowid NOT IN (
+  SELECT MIN(rowid)
+  FROM events
+  GROUP BY uid
+);
+
+CREATE TABLE events_new (
+  "event_uid" INTEGER PRIMARY KEY,
+  "uid" TEXT NOT NULL UNIQUE,
+  "title" TEXT NOT NULL,
+  "date_at" DATETIME NOT NULL,
+  "time_start" TEXT NOT NULL,
+  "time_end" TEXT NOT NULL,
+  "posted_by" TEXT NOT NULL,
+  "location" TEXT NOT NULL,
+  "event_type" TEXT NOT NULL,
+  "link" TEXT NOT NULL,
+  "description" TEXT NOT NULL,
+  "timezone" TEXT NOT NULL,
+  "notification" TEXT NOT NULL,
+  "deleteDate" INTEGER NULL
+);
+
+INSERT INTO events_new (event_uid, uid, title, date_at, time_start, time_end, posted_by, location, event_type, link, description, timezone, notification, deleteDate)
+SELECT event_uid, uid, title, date_at, time_start, time_end, posted_by, location, event_type, link, description, timezone, notification, deleteDate FROM events;
+
+DROP TABLE events;
+ALTER TABLE events_new RENAME TO events;