Do some data cleaning/unification on activation or upgrade.

bp-docs-install-update-script.php

<?php

function bp_docs_upgrade_script_1_9() {
	global $wpdb;
	$bp = buddypress();

	// Clean the meta_values that got grossed up in BP 2.0
	$wpdb->update(  $bp->groups->table_name_groupmeta,
					array( 'meta_key' => 'bp-docs' ),
					array( 'meta_key' => 'bpdocs' )
					);

	// Make sure every group has a valid setting.
	$group_ids = bp_docs_get_groups_missing_docs_settings();

	// Set default settings of "on" and "member" because that was the old default if no setting was set.
	$settings = array(
		'group-enable'	=> 1,
		'can-create' 	=> 'member',
	);

	foreach ( $group_ids as $group_id ) {
		groups_update_groupmeta( $group_id, 'bp-docs', $settings );
	}
}

function bp_docs_install_script() {
	global $wpdb;
	$bp = buddypress();

	// Make sure every group has a valid setting.
	$group_ids = bp_docs_get_groups_missing_docs_settings();

	// Set default settings of "off" and "member" so that docs are enabled by request, not default.
	$settings = array(
		'group-enable'	=> 0,
		'can-create' 	=> 'member',
	);

	foreach ( $group_ids as $group_id ) {
		groups_update_groupmeta( $group_id, 'bp-docs', $settings );
	}
}

function bp_docs_get_groups_missing_docs_settings() {
	global $wpdb;
	$bp = buddypress();

	$group_ids = $wpdb->get_col(
		"SELECT g.id FROM {$bp->groups->table_name} g
		LEFT JOIN {$bp->groups->table_name_groupmeta} AS m
		ON (g.id = m.group_id AND m.meta_key = 'bp-docs')
		WHERE ( CAST(m.meta_value AS CHAR) = '' OR m.id IS NULL )"
		);

	return array_map( 'intval', $group_ids );
}