buchkg

hi i have some errors:

Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the “Displayed Everywhere” sidebar. Defaulting to “sidebar-1”. Manually set the id to “sidebar-1” to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.) in /home2/ikexpert/public_html/3dstudio/wp-includes/functions.php on line 3560

Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the “Sidebar Blog” sidebar. Defaulting to “sidebar-2”. Manually set the id to “sidebar-2” to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.) in /home2/ikexpert/public_html/3dstudio/wp-includes/functions.php on line 3560

Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the “Sidebar Pages” sidebar. Defaulting to “sidebar-3”. Manually set the id to “sidebar-3” to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.) in /home2/ikexpert/public_html/3dstudio/wp-includes/functions.php on line 3560

Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the “Footer – column1” sidebar. Defaulting to “sidebar-4”. Manually set the id to “sidebar-4” to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.) in /home2/ikexpert/public_html/3dstudio/wp-includes/functions.php on line 3560

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home2/ikexpert/public_html/3dstudio/wp-includes/functions.php:3560) in /home2/ikexpert/public_html/3dstudio/wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/masonry_entries.php on line 32

But i dont have register_sidebar() function in functions.php
How do I fix this?