diff --git a/ansible/group_vars/environment_name_delius_core_development_dev_delius_primarydb.yml b/ansible/group_vars/environment_name_delius_core_development_dev_delius_primarydb.yml
index c61f443a7..81b2bd321 100644
--- a/ansible/group_vars/environment_name_delius_core_development_dev_delius_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_core_development_dev_delius_primarydb.yml
@@ -23,9 +23,6 @@ delius_users:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 # OFFENDER_DELTA and DOMAIN_EVENT are dynamic tables cleared down by Integration Services.
 # Prevent changing these to unrepresentative statistics.
 database_locked_statistics:
diff --git a/ansible/group_vars/environment_name_delius_core_test_test_delius_primarydb.yml b/ansible/group_vars/environment_name_delius_core_test_test_delius_primarydb.yml
index d738ec8ca..de0a8603a 100644
--- a/ansible/group_vars/environment_name_delius_core_test_test_delius_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_core_test_test_delius_primarydb.yml
@@ -40,9 +40,6 @@ delius_users:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 database_parameters:
   processes: 1500
   compatible: 19.14.0
diff --git a/ansible/group_vars/environment_name_delius_mis_development_dev_boe_primarydb.yml b/ansible/group_vars/environment_name_delius_mis_development_dev_boe_primarydb.yml
index fd1cf7cc9..b66a9c827 100644
--- a/ansible/group_vars/environment_name_delius_mis_development_dev_boe_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_mis_development_dev_boe_primarydb.yml
@@ -28,8 +28,5 @@ required_patches:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 source_db: "DMDBOE"
 db_backup_s3_bucket_name: "{{ environment_name }}-oracle-boe-db-backups"
diff --git a/ansible/group_vars/environment_name_delius_mis_development_dev_dsd_primarydb.yml b/ansible/group_vars/environment_name_delius_mis_development_dev_dsd_primarydb.yml
index f0c9624c6..0e5d0a623 100644
--- a/ansible/group_vars/environment_name_delius_mis_development_dev_dsd_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_mis_development_dev_dsd_primarydb.yml
@@ -13,8 +13,5 @@ delius_users:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 source_db: "DMDDSD"
 db_backup_s3_bucket_name: "{{ environment_name }}-oracle-dsd-db-backups"
diff --git a/ansible/group_vars/environment_name_delius_mis_development_dev_mis_primarydb.yml b/ansible/group_vars/environment_name_delius_mis_development_dev_mis_primarydb.yml
index d68cc3118..fec0c8340 100644
--- a/ansible/group_vars/environment_name_delius_mis_development_dev_mis_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_mis_development_dev_mis_primarydb.yml
@@ -21,8 +21,5 @@ required_patches:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 source_db: "DMDMIS"
 db_backup_s3_bucket_name: "{{ environment_name }}-oracle-mis-db-backups"
diff --git a/ansible/group_vars/environment_name_delius_mis_preproduction_stage_boe_primarydb.yml b/ansible/group_vars/environment_name_delius_mis_preproduction_stage_boe_primarydb.yml
index 52f5be2b1..eedc24662 100644
--- a/ansible/group_vars/environment_name_delius_mis_preproduction_stage_boe_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_mis_preproduction_stage_boe_primarydb.yml
@@ -30,8 +30,5 @@ delius_users:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 db_backup_s3_bucket_name: "{{ environment_name }}-oracle-boe-db-backups"
 source_db: "STGBOE"
diff --git a/ansible/group_vars/environment_name_delius_mis_preproduction_stage_dsd_primarydb.yml b/ansible/group_vars/environment_name_delius_mis_preproduction_stage_dsd_primarydb.yml
index 8c324baf9..5f51a8ceb 100644
--- a/ansible/group_vars/environment_name_delius_mis_preproduction_stage_dsd_primarydb.yml
+++ b/ansible/group_vars/environment_name_delius_mis_preproduction_stage_dsd_primarydb.yml
@@ -26,9 +26,6 @@ delius_users:
 oracle_software:
   version: "19.24"
   combo_patch: p36522439_190000_Linux-x86-64.zip
-  opatch:
-    version: 12.2.0.1.43
-    filename: p6880880_190000_Linux-x86-64.12.2.0.1.43.zip
 required_patches:
   p35012866:
     patch_files: