MDL-58266 core_completion: fix db structure.

Make coursemoduleid, userid fields in new course_modules_viewed
to match those in course_modules_completion table.

lib/db/install.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<XMLDB PATH="lib/db" VERSION="20221013" COMMENT="XMLDB file for core Moodle tables"
+<XMLDB PATH="lib/db" VERSION="20221017" COMMENT="XMLDB file for core Moodle tables"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="../../lib/xmldb/xmldb.xsd"
 >
@@ -4748,9 +4748,9 @@
     <TABLE NAME="course_modules_viewed" COMMENT="Tracks the completion viewed (viewed with cmid/userid and otherwise no row) of each user on each activity.">
       <FIELDS>
         <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
-        <FIELD NAME="coursemoduleid" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Activity that has been viewed (or not)."/>
-        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="ID of user who has (or hasn't) viewed the activity."/>
-        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Time at which the completion viewed created."/>
+        <FIELD NAME="coursemoduleid" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="Activity that has been viewed (or not)."/>
+        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="ID of user who has (or hasn't) viewed the activity."/>
+        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="Time at which the completion viewed created."/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>