An odd toolbar appeared on the left side of the table - how to close it?

English
#1

The toolbar looks like this; I couldn’t figure out its functionality nor how to close it. Any help?

image description

#2

May be Ctrl+F12?

#3

doesn’t work :frowning:

#4

From menu Data - Group and Outline - Ungroup nor work also? May be sheet is protected?

#5

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