Re: [4.4.2]Error on automated backup, core\task\course_backup_task,array_key_exists(): Argument #2 ($array) must be of type array, null given

Do you see anything serious here?

$ php check_database_schema.php
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backup_logs
 * Unexpected index 'HZ_mdl_backlogs_bacidtimecre_ix'.
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bigbluebuttonbn
 * column 'recordings_deleted' is missing
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bigbluebuttonbn_logs
 * Unexpected index 'HZ_mdl_bigblogs_bnidlogmeta_ix'.
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auth_saml2_kvstore
 * Unexpected index 'HZ_mdl_authsamlkvst_expix'.
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format_tabs_options
 * Unexpected index 'mdl_formtabsopti_cfo_ix'.
 * Unexpected index 'mdl_formtabsopti_id_ix'.
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local_recompletion_sa
 * column 'courseid' has default '0', expected '1' (I)
 * Missing index 'attempt' (not unique (attempt)).
CREATE INDEX mdl_locarecosa_att_ix ON mdl_local_recompletion_sa (attempt);
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local_recompletion_ssv
 * column 'attemptid' has default '0', expected '1' (I)
 * column 'elementid' has default '0', expected 'NULL' (I)
 * column 'courseid' has default '0', expected '1' (I)
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logstore_standard_log
 * Unexpected index 'HZ_mdl_logsstanlog_couactobj_ix'.
 * Unexpected index 'HZ_mdl_logsstanlog_coucoiiconlcrud_ix'.
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multitabs_course_format_opts
 * table is not expected
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theme_learnr_flavours
 * table is not expected
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