diff --git a/schema/patch-2-page-counter.sql b/schema/patch-2-page-counter.sql
index e873c90..7929895 100644
--- a/schema/patch-2-page-counter.sql
+++ b/schema/patch-2-page-counter.sql
@@ -4,6 +4,7 @@ CREATE TABLE IF NOT EXISTS /*_*/wiretap_counter_period (
 	count          INT(8) UNSIGNED NOT NULL DEFAULT 0,
 	count_unique   INT(8) UNSIGNED NOT NULL DEFAULT 0
 ) /*$wgDBTableOptions*/;
+DROP INDEX /*i*/wiretap_counter_period_page_id ON /*_*/wiretap_counter_period;
 CREATE UNIQUE INDEX /*i*/wiretap_counter_period_page_id ON /*_*/wiretap_counter_period (page_id);
 
 CREATE TABLE IF NOT EXISTS /*_*/wiretap_counter_alltime (
@@ -12,4 +13,5 @@ CREATE TABLE IF NOT EXISTS /*_*/wiretap_counter_alltime (
 	count          INT(8) UNSIGNED NOT NULL DEFAULT 0,
 	count_unique   INT(8) UNSIGNED NOT NULL DEFAULT 0
 );
+DROP INDEX /*i*/wiretap_counter_alltime_page_id ON /*_*/wiretap_counter_alltime;
 CREATE UNIQUE INDEX /*i*/wiretap_counter_alltime_page_id ON /*_*/wiretap_counter_alltime (page_id);
diff --git a/schema/patch-3-legacy-counter.sql b/schema/patch-3-legacy-counter.sql
index 3c9b304..05794a9 100644
--- a/schema/patch-3-legacy-counter.sql
+++ b/schema/patch-3-legacy-counter.sql
@@ -2,4 +2,5 @@ CREATE TABLE IF NOT EXISTS /*_*/wiretap_legacy (
 	legacy_id        INT(8) UNSIGNED NOT NULL,
 	legacy_counter   INT(8) UNSIGNED NOT NULL DEFAULT 0
 ) /*$wgDBTableOptions*/;
+DROP INDEX /*i*/wiretap_counter_legacy_page_id ON /*_*/wiretap_legacy;
 CREATE UNIQUE INDEX /*i*/wiretap_counter_legacy_page_id ON /*_*/wiretap_legacy (legacy_id);