[birds] Fix reset sequence for ebird imports

vrobbler/apps/scrobbles/migrations/0084_fix_ebird_sequence.py

@@ -0,0 +1,30 @@
+from django.db import migrations
+
+
+def reset_sequence(apps, schema_editor):
+    from django.db import connection
+
+    with connection.cursor() as cursor:
+        vendor = connection.vendor
+        if vendor == "postgresql":
+            cursor.execute(
+                "SELECT setval('scrobbles_ebirdcsvimport_id_seq', "
+                "COALESCE((SELECT MAX(id) + 1 FROM scrobbles_ebirdcsvimport), 1), "
+                "false)"
+            )
+        elif vendor == "sqlite":
+            cursor.execute(
+                "UPDATE sqlite_sequence SET seq = ("
+                "SELECT COALESCE(MAX(id), 0) FROM scrobbles_ebirdcsvimport"
+                ") WHERE name = 'scrobbles_ebirdcsvimport'"
+            )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("scrobbles", "0083_migrate_birding_data"),
+    ]
+
+    operations = [
+        migrations.RunPython(reset_sequence, migrations.RunPython.noop),
+    ]