Fatal error: Cannot redeclare image()

I just tried to activate the base plugin 2.0.1, and receive the following error:

Plugin could not be activated because it triggered a fatal error.

Fatal error: Cannot redeclare image() (previously declared in /home/...deleteing my info.../public_html/mvazmtn/wp-content/themes/overall/framework/options/option_shortcodes.php:152) in
/home/...deleting my info.../public_html/mvazmtn/wp-content/plugins/oik/bobbfunc.inc on line 123

The Overall theme is essential to the website, so I cannot change that. Any idea what is going on?

As far as I can tell, this is the code in the Overall theme file

function image( $atts, $content = null ) {
		extract( shortcode_atts( array(
		'small' => '',
		'big' => '',
		'align' => '',
		'width' => '',
		'height' => '',
		'type' => '',
		'skin' => '',
		'link' => '',
		'target' => '',
		), $atts ) );

		$content =  '<div class="image_frame_'.esc_attr($align).'">';

		if(esc_attr($skin) != "off"){
		$content .= '<div class="image_skin">';
		$content .= '<div class="image_inside_border">';
		$content .= '<div class="image_skin_anime" style="width:'.esc_attr($width).'px; height:'.esc_attr($height).'px;">';
		$content .= '<div class="image_holder" id="zoom_'.esc_attr($type).'">';
		}

		if(esc_attr($big) != ""){
		$content .= '<a href="'.esc_attr($big).'" rel="prettyPhoto[canyon_gallery]">';
		}

		if(esc_attr($link) != ""){
		$content .= '<a href="'.esc_attr($link).'" target="'.esc_attr($target).'">';
		}

		$content .= '<img src="'.esc_attr($small).'" style="width:'.esc_attr($width).'px; height:'.esc_attr($height).'px;" alt=""/>';

		if(esc_attr($big) != "" or esc_attr($link) != ""){
		$content .= '</a>';
		}

		if(esc_attr($skin) != "off"){
		$content .= '</div></div></div></div>';
		}

		$content .='</div>';

	return $content;

	}
	add_shortcode('image', 'image');

http://wordpress.org/plugins/oik/