Database error

A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was:
(SQL query hidden)
from within function "Parser::replaceLinkHolders". MySQL returned error "1270: Illegal mix of collations (latin1_bin,IMPLICIT), (utf8mb4_general_ci,COERCIBLE), (utf8mb4_general_ci,COERCIBLE) for operation 'in' (127.0.0.1:3306)".