diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/storage/SubscriptionManager.java b/service/src/main/java/org/whispersystems/textsecuregcm/storage/SubscriptionManager.java
index 8fcd7d88b..2da19847b 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/storage/SubscriptionManager.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/storage/SubscriptionManager.java
@@ -46,8 +46,6 @@ public class SubscriptionManager {
 
   public static final String KEY_USER = "U";  // B  (Hash Key)
   public static final String KEY_PASSWORD = "P";  // B
-  @Deprecated
-  public static final String KEY_CUSTOMER_ID = "C";  // S  (GSI Hash Key of `c_to_u` index)
   public static final String KEY_PROCESSOR_ID_CUSTOMER_ID = "PC"; // B (GSI Hash Key of `pc_to_u` index)
   public static final String KEY_CREATED_AT = "R";  // N
   public static final String KEY_PROCESSOR_CUSTOMER_IDS_MAP = "PCI"; // M
@@ -59,7 +57,7 @@ public class SubscriptionManager {
   public static final String KEY_CANCELED_AT = "B";  // N
   public static final String KEY_CURRENT_PERIOD_ENDS_AT = "D";  // N
 
-  public static final String INDEX_NAME = "c_to_u";  // Hash Key "C"
+  public static final String INDEX_NAME = "pc_to_u";  // Hash Key "C"
 
   public static class Record {
 
@@ -188,26 +186,26 @@ public class SubscriptionManager {
   /**
    * Looks in the GSI for a record with the given customer id and returns the user id.
    */
-  public CompletableFuture<byte[]> getSubscriberUserByStripeCustomerId(@Nonnull String customerId) {
+  public CompletableFuture<byte[]> getSubscriberUserByProcessorCustomer(ProcessorCustomer processorCustomer) {
     QueryRequest query = QueryRequest.builder()
         .tableName(table)
         .indexName(INDEX_NAME)
-        .keyConditionExpression("#customer_id = :customer_id")
+        .keyConditionExpression("#processor_customer_id = :processor_customer_id")
         .projectionExpression("#user")
         .expressionAttributeNames(Map.of(
-            "#customer_id", KEY_CUSTOMER_ID,
+            "#processor_customer_id", KEY_PROCESSOR_ID_CUSTOMER_ID,
             "#user", KEY_USER))
         .expressionAttributeValues(Map.of(
-            ":customer_id", s(Objects.requireNonNull(customerId))))
+            ":processor_customer_id", b(processorCustomer.toDynamoBytes())))
         .build();
     return client.query(query).thenApply(queryResponse -> {
       int count = queryResponse.count();
       if (count == 0) {
         return null;
       } else if (count > 1) {
-        logger.error("expected invariant of 1-1 subscriber-customer violated for customer {}", customerId);
+        logger.error("expected invariant of 1-1 subscriber-customer violated for customer {}", processorCustomer);
         throw new IllegalStateException(
-            "expected invariant of 1-1 subscriber-customer violated for customer " + customerId);
+            "expected invariant of 1-1 subscriber-customer violated for customer " + processorCustomer);
       } else {
         Map<String, AttributeValue> result = queryResponse.items().get(0);
         return result.get(KEY_USER).b().asByteArray();
@@ -328,14 +326,12 @@ public class SubscriptionManager {
                 "AND attribute_not_exists(#processors_to_customer_ids.#processor_name)"
         )
         .updateExpression("SET "
-            + "#customer_id = :customer_id, "
             + "#processor_customer_id = :processor_customer_id, "
             + "#processors_to_customer_ids.#processor_name = :customer_id, "
             + "#accessed_at = :accessed_at"
         )
         .expressionAttributeNames(Map.of(
             "#accessed_at", KEY_ACCESSED_AT,
-            "#customer_id", KEY_CUSTOMER_ID,
             "#processor_customer_id", KEY_PROCESSOR_ID_CUSTOMER_ID,
             "#processor_name", activeProcessorCustomer.processor().name(),
             "#processors_to_customer_ids", KEY_PROCESSOR_CUSTOMER_IDS_MAP
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/SubscriptionManagerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/SubscriptionManagerTest.java
index 8f3c5d952..d90f38b1e 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/SubscriptionManagerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/SubscriptionManagerTest.java
@@ -56,30 +56,12 @@ class SubscriptionManagerTest {
           attributeName(SubscriptionManager.KEY_USER).
           attributeType(ScalarAttributeType.B).
           build()).
-      attributeDefinition(AttributeDefinition.builder().
-          attributeName(SubscriptionManager.KEY_CUSTOMER_ID).
-          attributeType(ScalarAttributeType.S).
-          build()).
       attributeDefinition(AttributeDefinition.builder().
           attributeName(SubscriptionManager.KEY_PROCESSOR_ID_CUSTOMER_ID).
-          attributeType(ScalarAttributeType.S).
+          attributeType(ScalarAttributeType.B).
           build()).
       globalSecondaryIndex(GlobalSecondaryIndex.builder().
-          indexName("c_to_u").
-          keySchema(KeySchemaElement.builder().
-              attributeName(SubscriptionManager.KEY_CUSTOMER_ID).
-              keyType(KeyType.HASH).
-              build()).
-          projection(Projection.builder().
-              projectionType(ProjectionType.KEYS_ONLY).
-              build()).
-          provisionedThroughput(ProvisionedThroughput.builder().
-              readCapacityUnits(20L).
-              writeCapacityUnits(20L).
-              build()).
-          build()).
-      globalSecondaryIndex(GlobalSecondaryIndex.builder().
-          indexName("pc_to_u").
+          indexName(SubscriptionManager.INDEX_NAME).
           keySchema(KeySchemaElement.builder().
               attributeName(SubscriptionManager.KEY_PROCESSOR_ID_CUSTOMER_ID).
               keyType(KeyType.HASH).
@@ -193,7 +175,8 @@ class SubscriptionManagerTest {
 
     // TODO test new customer ID with new processor does change the customer ID, once there is another processor
 
-    assertThat(subscriptionManager.getSubscriberUserByStripeCustomerId(customer))
+    assertThat(subscriptionManager.getSubscriberUserByProcessorCustomer(
+        new ProcessorCustomer(customer, SubscriptionProcessor.STRIPE)))
         .succeedsWithin(Duration.ofSeconds(3)).
         isEqualTo(user);
   }
@@ -210,7 +193,8 @@ class SubscriptionManagerTest {
     assertThat(subscriptionManager.updateProcessorAndCustomerId(userRecord,
         new ProcessorCustomer(customer, SubscriptionProcessor.STRIPE),
         subscriptionUpdated)).succeedsWithin(Duration.ofSeconds(3));
-    assertThat(subscriptionManager.getSubscriberUserByStripeCustomerId(customer)).
+    assertThat(subscriptionManager.getSubscriberUserByProcessorCustomer(
+        new ProcessorCustomer(customer, SubscriptionProcessor.STRIPE))).
         succeedsWithin(Duration.ofSeconds(3)).
         isEqualTo(user);
   }