diff --git a/core/src/main/java/google/registry/model/registrar/Registrar.java b/core/src/main/java/google/registry/model/registrar/Registrar.java
index 2aabaf05d..efb71ff1d 100644
--- a/core/src/main/java/google/registry/model/registrar/Registrar.java
+++ b/core/src/main/java/google/registry/model/registrar/Registrar.java
@@ -62,7 +62,6 @@ import com.googlecode.objectify.Key;
 import com.googlecode.objectify.annotation.Embed;
 import com.googlecode.objectify.annotation.Entity;
 import com.googlecode.objectify.annotation.Id;
-import com.googlecode.objectify.annotation.Ignore;
 import com.googlecode.objectify.annotation.IgnoreSave;
 import com.googlecode.objectify.annotation.Index;
 import com.googlecode.objectify.annotation.Mapify;
@@ -76,7 +75,6 @@ import google.registry.model.JsonMapBuilder;
 import google.registry.model.Jsonifiable;
 import google.registry.model.UnsafeSerializable;
 import google.registry.model.UpdateAutoTimestamp;
-import google.registry.model.annotations.DeleteAfterMigration;
 import google.registry.model.annotations.InCrossTld;
 import google.registry.model.annotations.ReportedOn;
 import google.registry.model.common.EntityGroupRoot;
@@ -389,10 +387,6 @@ public class Registrar extends ImmutableObject
    */
   @Index @Nullable Long ianaIdentifier;
 
-  /** Identifier of registrar used in external billing system (e.g. Oracle). */
-  // TODO(sarahbot@): Drop this column from the table in a flyway script in a follow up PR.
-  @DeleteAfterMigration @Nullable @Deprecated @Ignore Long billingIdentifier;
-
   /** Purchase Order number used for invoices in external billing system, if applicable. */
   @Nullable String poNumber;
 
diff --git a/db/src/main/resources/sql/er_diagram/brief_er_diagram.html b/db/src/main/resources/sql/er_diagram/brief_er_diagram.html
index 374862e7b..32fa6948f 100644
--- a/db/src/main/resources/sql/er_diagram/brief_er_diagram.html
+++ b/db/src/main/resources/sql/er_diagram/brief_er_diagram.html
@@ -261,7 +261,7 @@ td.section {
     </tr> 
     <tr> 
      <td class="property_name">generated on</td> 
-     <td class="property_value">2022-05-05 16:42:10.390681</td> 
+     <td class="property_value">2022-05-23 16:42:00.648335</td> 
     </tr> 
     <tr>
      <td class="property_name">last flyway file</td>
@@ -284,7 +284,7 @@ td.section {
      generated on
     </text> 
     <text text-anchor="start" x="4055.5" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">
-     2022-05-05 16:42:10.390681
+     2022-05-23 16:42:00.648335
     </text> 
     <polygon fill="none" stroke="#888888" points="3968,-4 3968,-44 4233,-44 4233,-4 3968,-4" /> <!-- allocationtoken_a08ccbef --> 
     <g id="node1" class="node"> 
diff --git a/db/src/main/resources/sql/er_diagram/full_er_diagram.html b/db/src/main/resources/sql/er_diagram/full_er_diagram.html
index 9c215c645..3329b38a9 100644
--- a/db/src/main/resources/sql/er_diagram/full_er_diagram.html
+++ b/db/src/main/resources/sql/er_diagram/full_er_diagram.html
@@ -261,7 +261,7 @@ td.section {
     </tr> 
     <tr> 
      <td class="property_name">generated on</td> 
-     <td class="property_value">2022-05-05 16:42:08.300052</td> 
+     <td class="property_value">2022-05-23 16:41:58.740617</td> 
     </tr> 
     <tr>
      <td class="property_name">last flyway file</td>
@@ -284,7 +284,7 @@ td.section {
      generated on
     </text> 
     <text text-anchor="start" x="4755.52" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">
-     2022-05-05 16:42:08.300052
+     2022-05-23 16:41:58.740617
     </text> 
     <polygon fill="none" stroke="#888888" points="4668.02,-4 4668.02,-44 4933.02,-44 4933.02,-4 4668.02,-4" /> <!-- allocationtoken_a08ccbef --> 
     <g id="node1" class="node"> 
diff --git a/db/src/main/resources/sql/schema/db-schema.sql.generated b/db/src/main/resources/sql/schema/db-schema.sql.generated
index 78f851e86..b88470055 100644
--- a/db/src/main/resources/sql/schema/db-schema.sql.generated
+++ b/db/src/main/resources/sql/schema/db-schema.sql.generated
@@ -572,7 +572,6 @@
        registrar_id text not null,
         allowed_tlds text[],
         billing_account_map hstore,
-        billing_identifier int8,
         block_premium_names boolean not null,
         client_certificate text,
         client_certificate_hash text,