diff --git a/build/docker/Dockerfile b/build/docker/Dockerfile
index dca74e9e720..eb8e3ade6dc 100644
--- a/build/docker/Dockerfile
+++ b/build/docker/Dockerfile
@@ -57,7 +57,6 @@ RUN echo "host mail" >> /etc/msmtprc
 RUN echo "from local@localdomain.com" >> /etc/msmtprc
 RUN echo "domain localhost.localdomain" >> /etc/msmtprc
 RUN echo "sendmail_path=/usr/bin/msmtp -t" >> /usr/local/etc/php/conf.d/php-sendmail.ini
-RUN echo "localhost localhost.localdomain" >> /etc/hosts
 
 EXPOSE 80
 
diff --git a/build/docker/docker-compose.yml b/build/docker/docker-compose.yml
index 2167f069f25..b72118de5fb 100644
--- a/build/docker/docker-compose.yml
+++ b/build/docker/docker-compose.yml
@@ -46,6 +46,8 @@ services:
         networks:
             - internal-pod
             - external-pod
+        extra_hosts:
+            - "localhost.localdomain:127.0.0.1"
 
     mail:
         image: maildev/maildev
diff --git a/htdocs/install/mysql/migration/14.0.0-15.0.0.sql b/htdocs/install/mysql/migration/14.0.0-15.0.0.sql
index f4f6e9e349f..9555bcd15da 100644
--- a/htdocs/install/mysql/migration/14.0.0-15.0.0.sql
+++ b/htdocs/install/mysql/migration/14.0.0-15.0.0.sql
@@ -38,6 +38,22 @@
 -- VMYSQL4.3 ALTER TABLE llx_eventorganization_conferenceorboothattendee MODIFY COLUMN fk_actioncomm integer NULL;
 -- VPGSQL8.2 ALTER TABLE llx_eventorganization_conferenceorboothattendee ALTER COLUMN fk_actioncomm DROP NOT NULL;
 
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP FOREIGN KEY fx_eventorganization_conferenceorboothattendee_fk_soc;
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP FOREIGN KEY fx_eventorganization_conferenceorboothattendee_fk_actioncomm;
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP FOREIGN KEY fx_eventorganization_conferenceorboothattendee_fk_project;
+
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_rowid (rowid);
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_ref (ref);
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_soc (fk_soc);
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_actioncomm (fk_actioncomm);
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_email (email);
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_status (status);
+
+-- VMYSQL4.1 DROP INDEX uk_eventorganization_conferenceorboothattendee on llx_eventorganization_conferenceorboothattendee;
+-- VPGSQL8.2 DROP INDEX uk_eventorganization_conferenceorboothattendee;
+
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD UNIQUE INDEX uk_eventorganization_conferenceorboothattendee(fk_project, email, fk_actioncomm);
+
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD COLUMN fk_project integer NOT NULL;
 
 UPDATE llx_extrafields SET elementtype = 'salary' WHERE elementtype = 'payment_salary';