diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index d7163ab7..932b288a 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -1100,6 +1100,20 @@ matrix_postgres_additional_databases: |
     }] if (matrix_dimension_enabled and matrix_dimension_database_engine == 'postgres' and matrix_dimension_database_hostname == 'matrix-postgres') else [])
    }}
 
+matrix_postgres_import_roles_to_ignore: |
+  {{
+    [matrix_postgres_connection_username]
+    +
+    matrix_postgres_additional_databases|map(attribute='username')
+  }}
+
+matrix_postgres_import_databases_to_ignore: |
+  {{
+    [matrix_postgres_db_name]
+    +
+    matrix_postgres_additional_databases|map(attribute='name')
+  }}
+
 ######################################################################
 #
 # /matrix-postgres
diff --git a/roles/matrix-postgres/defaults/main.yml b/roles/matrix-postgres/defaults/main.yml
index 5755742f..0c516281 100644
--- a/roles/matrix-postgres/defaults/main.yml
+++ b/roles/matrix-postgres/defaults/main.yml
@@ -43,6 +43,22 @@ matrix_postgres_container_postgres_bind_port: ""
 #     password: some_password
 matrix_postgres_additional_databases: []
 
+# A list of roles/users to avoid creating when importing (or upgrading) the database.
+# If a dump file contains the roles and they've also been created beforehand (see `matrix_postgres_additional_databases`),
+# importing would fail.
+# We either need to not create them or to ignore the `CREATE ROLE` statements in the dump.
+matrix_postgres_import_roles_to_ignore: [matrix_postgres_connection_username]
+
+matrix_postgres_import_roles_ignore_regex: "^CREATE ROLE ({{ matrix_postgres_import_roles_to_ignore|join('|') }});"
+
+# A list of databases to avoid creating when importing (or upgrading) the database.
+# If a dump file contains the databases and they've also been created beforehand (see `matrix_postgres_additional_databases`),
+# importing would fail.
+# We either need to not create them or to ignore the `CREATE DATABASE` statements in the dump.
+matrix_postgres_import_databases_to_ignore: [matrix_postgres_db_name]
+
+matrix_postgres_import_databases_ignore_regex: "^CREATE DATABASE ({{ matrix_postgres_import_databases_to_ignore|join('|') }})\\s"
+
 # The number of seconds to wait after starting `matrix-postgres.service`
 # and before trying to run queries for creating additional databases/users against it.
 #
diff --git a/roles/matrix-postgres/tasks/import_postgres.yml b/roles/matrix-postgres/tasks/import_postgres.yml
index 33d98691..c26affbb 100644
--- a/roles/matrix-postgres/tasks/import_postgres.yml
+++ b/roles/matrix-postgres/tasks/import_postgres.yml
@@ -74,8 +74,8 @@
       {{ matrix_postgres_docker_image_latest }}
       -c "cat /{{ server_path_postgres_dump|basename }} |
       {{ 'gunzip |' if server_path_postgres_dump.endswith('.gz') else '' }}
-      grep -vE '^CREATE ROLE {{ matrix_postgres_connection_username }}' |
-      grep -vE '^CREATE DATABASE {{ matrix_postgres_db_name }}' |
+      grep -vE '{{ matrix_postgres_import_roles_ignore_regex }}' |
+      grep -vE '{{ matrix_postgres_import_databases_ignore_regex }}' |
       psql -v ON_ERROR_STOP=1 -h matrix-postgres"
 
 # This is a hack.
diff --git a/roles/matrix-postgres/tasks/upgrade_postgres.yml b/roles/matrix-postgres/tasks/upgrade_postgres.yml
index 72f327b3..564265d8 100644
--- a/roles/matrix-postgres/tasks/upgrade_postgres.yml
+++ b/roles/matrix-postgres/tasks/upgrade_postgres.yml
@@ -135,8 +135,8 @@
       {{ matrix_postgres_docker_image_latest }}
       -c "cat /in/{{ postgres_dump_name }} |
       {{ 'gunzip |' if postgres_dump_name.endswith('.gz') else '' }}
-      grep -vE '^CREATE ROLE {{ matrix_postgres_connection_username }}' |
-      grep -vE '^CREATE DATABASE {{ matrix_postgres_db_name }}' |
+      grep -vE '{{ matrix_postgres_import_roles_ignore_regex }}' |
+      grep -vE '{{ matrix_postgres_import_databases_ignore_regex }}' |
       psql -v ON_ERROR_STOP=1 -h matrix-postgres"
 
 # This is a hack.